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Getting Started

Would you like to get started with CitNetExplorer? Below we provide a step-by-step tutorial that guides you through the process of collecting bibliographic data, constructing a citation network, and visualizing and analyzing the network.

Tutorial

The tutorial is also available in a PDF file.

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Comments

Thereza Freire November 26th, 2019 3:32 am

Hi!
Thanks for developing this tool!
I have met the same problem: "An unexpected error has occurred (java.lang.NullPointerException). The program will be terminated".
I had already excluded early accessed files, I tried to download CitNet again and reinstalled java 8, but the problem remains. I've just get open the app once, using my first search.
Could you help me?
Thanks a lot!

Reply
- Ludo Waltman November 26th, 2019 9:33 am
  
  When opening your files from Web of Science, could you uncheck the 'Non-matching cited references' checkbox to see if this solves the problem?
  
  Reply
  - Thereza Freire November 26th, 2019 11:55 am
    
    Good morning!
    I did, but it didn't solve. :-(
    
    Reply
    - Ludo Waltman November 26th, 2019 12:14 pm
      
      Could you then send your file to citnetexplorer@cwts.leidenuniv.nl? I will then take a look at your problem.
      
      Reply
Philippe Blanchard November 7th, 2019 12:02 pm

I have found my mistake and could import citations from Web of science. Their formatting is too specific to be replicated with a reasonable amount of efforts, so I guess CitNetExplorer does not only "allow citation networks to be imported directly from the Web of Science database", but also *needs* it. Any idea about another software that does the same with self-cropped data?
Thanks anyway for the hard work.
Philippe

Reply
- Ludo Waltman November 23rd, 2019 4:38 pm
  
  It is easiest to work with Web of Science data. However, you can also use other data sources. The data then needs to be provided as input to CitNetExplorer in a publications file and a citations file. The difficulty is that you need to create these files yourself based on the data obtained from your data source. This requires some skills in data processing.
  I advise against trying to replicate the Web of Science file format. This is quite challenging.
  
  Reply
Nick Marko November 1st, 2019 9:28 am

how can i find a specific research field with citnetexplorer? If i download all data from one person?

Reply
- Ludo Waltman November 23rd, 2019 4:31 pm
  
  CitNetExplorer does not provide any functionality for working with predefined research fields (e.g., the journal subject categories in Web of Science). The software does provide functionality for clustering the publications in a citation network. The different clusters of publications may correspond with different research areas or research fields.
  
  Reply
Lorenzo Cassini October 30th, 2019 8:56 pm

Hello,
Thanks for developing CitNetExplorer. I'm getting started with it and I find it very useful.
I have and issue when importing data from Web of Science. I get this message: "An unexpected error has occurred (java.lang.NullPointerException). The program will be terminated". I found that excluding one of the publications (I pasted the register in this comment), the issue was solved. I identified the problematic publication by trial and error.
I've got this issue with other data, so it would be very helpful to know how to identify problematic publications. Thanks!
Note: following other comments, I excluded Early Access publications, but the issue stills.
J Polasik, M; Piotrowski, D Polasik, Michal; Piotrowski, Dariusz PAYMENT INNOVATIONS IN POLAND: THE ROLE OF PAYMENT SERVICES IN THE STRATEGIES OF COMMERCIAL BANKS EKONOMIA I PRAWO-ECONOMICS AND LAW English Article payment innovation; bank strategy; payment services; FinTech; payment card ADOPTION; CARDS This paper examines the significance of innovations in the area of payment services for strategies implemented by commercial banks in Poland. We propose a definition of payment innovations and present the evolution of their introduction in the Polish market, indicating the impact of legal regulations and the critical character of the new FinTech phenomenon. The analysis that we conducted was based on the results of a survey which obtained responses from 24 commercial banks representing almost the entire Polish retail banking sector based on the number of personal accounts maintained. The study helped to determine the main elements of the strategies implemented by banks in Poland. It also revealed the methods for competing in the area of payment services utilized by the banks, with innovative services as one of the leading elements. The results of the study indicated that there was a significant differentiation of applied strategies depending on a bank's size. In the case of larger banks, the main motivation for introducing payment innovations was characteristic of an offensive strategy, and for smaller banks - more often a defensive one. We also proposed a theoretical model for using the specific nature of payment innovations to build customer relationships and to apply cross-selling. [Polasik, Michal; Piotrowski, Dariusz] Nicolaus Copernicus Univ, Fac Econ Sci & Management, Dept Finance, Ul Gagarina 13A, PL-87100 Torun, Poland Polasik, M (reprint author), Nicolaus Copernicus Univ, Fac Econ Sci & Management, Dept Finance, Ul Gagarina 13A, PL-87100 Torun, Poland. michal.polasik@umk.pl; darius@econ.umk.pl Warsaw Institute of Banking; ALTERUM Grant [WIB/2014/01]; ALTERUM The article was funded by The Warsaw Institute of Banking and ALTERUM Grant No. WIB/2014/01. We would like to thank Anna Iwona Piotrowska and Natalia Kumkowska, who served as investigators. Moreover, we would like to thank Lech Kuklinski, Ph.D. the director of ALTERUM and director Pawel Widawski Ph.D. and Radoslaw Kotkowski from the Polish Bank Association for their support in carrying out this research project. [Anonymous], 2013, PROGRAM ROZWOJU OBRO; Arango C, 2015, J BANK FINANC, V55, P130, DOI 10.1016/j.jbankfin.2015.02.005; Bender C. M., 2011, INTERECONOMICS REV E, V46; Bikker J. A., 2002, EC FINANCIAL MODELLI; Bolt W., 2007, REV NETW ECON, V6, DOI [10.2202/1446-9022.1129, DOI 10.2202/1446-9022.1129]; Borestam A., 2011, ECB OCCASIONAL PAPER, V131; Canals J., 1999, EUROPEAN MANAGEMENT, V17, DOI [10.1016/s0263--2373(99)00047-x, DOI 10.1016/S0263--2373(99)00047-X]; Chakravorti S, 20031B2003 FED RES B; Chakravorti S, 2010, REV NETW ECON, V9; Church J, 2008, REV NETW ECON, V7, P337; Clark J. A, 1988, FEDERAL RESERVE BANK; Committee on Payment and Settlement Systems, 2012, INN RET PAYM; Dapp T., 2014, FINTECH DIGITAL R EV; Delis MD, 2010, OMEGA-INT J MANAGE S, V38, P268, DOI 10.1016/j.omega.2008.09.002; Deloitte, 2016, PAYM DISR EM CHALL E; DeYoung R., 2004, EC PERSPECTIVES, V28; DeYoung R., 2001, FEDERAL RESERVE BANK, VWP-01-06/2001, DOI [10.2139/ssrn.282721, DOI 10.2139/SSRN.282721]; Doligalski T., 2014, MODELE BIZNESU INTER; European Payments Council, 2009, EPC06606; Frazer P, 1985, PLASTIC ELECT MONEY; Gikas G., 1999, BANK KREDYT, V31; Gorka J., 2013, EFEKTYWNOSC INSTRUME, DOI [10.7172/978-83-63962-30-2, DOI 10.7172/978-83-63962-30-2]; Gorka J, 2014, P 2014 INT CASH C DE; Gostomski E, 2010, WSPOLCZESNA BANKOWOS; Gowrisankaran G, 2004, RAND J ECON, V35, P260, DOI 10.2307/1593691; Grzegorczyk T, 1997, STRATEGIE MARKETINGO; Grzywacz J, 2006, MARKETING DZIALALNOS; Hansen G, 2016, INNOWACJE BANKACH SA; Harasim J, 2013, J INNOVATION MANAGEM, V1; Harasim J, 2004, STRATEGIE MARKETINGO; Harasim J., 2011, EUROPEJSKI RYNEK PLA; Hernando I, 2007, J BANK FINANC, V31, P1083, DOI 10.1016/j.jbankfin.2006.10.011; Iwanczuk-Kaliska A, 2015, PROBL ZARZ, V13, P41, DOI 10.7172/1644-9584.54.3; Iwanicz-Drozdowska M., 2010, BANKOWOSC ZAGADNIENI; Kasiewicz S., 2013, SEKTOR BANKOWY MOTOR; Kasiewicz S, 2010, POLSKI SEKTOR BANKOW; Khiaonarong T, 2009, BANKING INNOVATION M, DOI [10.1007/978-3-7908-2333-2, DOI 10.1007/978-3-7908-2333-2]; Kisiel M, 2005, INTERNET KONKURENCYJ; Korenik D, 2002, KONKURENCYJNOSC KONK; Korenik D., 2006, INNOWACYJNE USLUGI B; Krupski R, 2009, KONCEPCJE STRATEGII; L'Hostis A, 2015, 2015 GLOBAL MOBILE B; Marcinkowska M, 2012, ACTA U LODZIENSIS FO; Marzec J., 2013, BANK KREDYT, V44; Matloka M, 2016, BANKI MOGA ZARABIAC; Mersch Yves, 2015, COMMUNICATION; Narodowy Bank Polski, 2012, PROGR RED OPL KART P; OECD/Eurostat, 2005, OSL MAN GUID COLL IN; Panowicz M., 2015, WYZWANIA BANKOWOSCI; Pawlowicz L, 2015, 602015 BAZ BANK; Pawlowska M, 2004, BANK KREDYT, V35; Payments Council European, 2009, EPC36208; Piotrowicz W, 2015, J GLOB INF TECH MAN, V18, P77, DOI 10.1080/1097198X.2015.1052684; Plooij M., 4712015 DNB, DOI [10.2139/ssrn.2602219, DOI 10.2139/SSRN.2602219]; Polasik M., 2012, INT J BANK ACCOUNT F, V4, P203, DOI DOI 10.1504/IJBAAF.2012.051590; Polasik M., 2012, 2652012 NBP; Polasik M, 2009, 2412009 NBP; Polasik M., 2016, ROZWOJ PRZEZ INNOWAC; Polasik M., 2007, BANKOWOSC ELEKTRONIC; Polasik M, 2013, INTEGRACJA EUROPEJSK; Polasik M, 2016, EKON PRAWO, V15, P103, DOI 10.12775/EiP.2016.007; Polasik M, 2015, PROBL ZARZ, V13, P102, DOI 10.7172/1644-9584.54.7; Polasik M, 2013, LECT NOTES BUS INF P, V141, P306, DOI 10.1007/978-3-642-40654-6_19; Polasik M, 2009, INT J BANK MARK, V27, P32, DOI 10.1108/02652320910928227; Rambure D., 2008, PAYMENT SYSTEMS SALT; Rochet J. C., 2006, REV NETW ECON, V5, P1, DOI DOI 10.2202/1446-9022.1085; Rochet JC, 2011, J EUR ECON ASSOC, V9, P462, DOI 10.1111/j.1542-4774.2011.01020.x; Rogers E.M., 1983, DIFFUSION INNOVATION; Rokita J., 2005, ZARZADZANIE STRATEGI; Shaw R., 2001, BANK STRATEGIES CHAL; Simon-Kucher & Partners, 2016, GLOB PRIC STUD 2014; Sokolowska E, 2015, ELECTRON COMMER R A, V14, P292, DOI 10.1016/j.elerap.2015.07.005; Spath D., 2012, EUROPEAN TREND SURVE; Stango Victor, 2004, REV NETW ECON, V3, P1, DOI DOI 10.2202/1446-9022.1040; Tunay KB, 2015, WORLD CONFERENCE ON TECHNOLOGY, INNOVATION AND ENTREPRENEURSHIP, P363, DOI 10.1016/j.sbspro.2015.06.335; Ward M., 2006, Information Security Technical Report, V11, P89, DOI 10.1016/j.istr.2006.03.001; Weclawski J., 2015, ANN UMCS SECTIO H OE, VXLIX; Wrzosek W., 2012, STRATEGIE MARKETINGO 78 2 2 3 3 UNIWERSYTET MIKOLAJA KOPERNIKA-NICOLAUS COPERNICUS UNIV TORUN WYDZIAL NAUK EKONOMICZNYCH & ZARZADZANIA, KATEDRA EKON, UL GAGARINA 13A, TORUN, 87-100, POLAND 1898-2255 2392-1625 EKON PRAWO Ekon. Prawo MAR 2016 15 1 73 101 10.12775/EiP.2016.006 29 Economics Business & Economics VH4DS WOS:000453148800006 DOAJ Gold 30/10/2019

Reply
Lorenzo Cassini October 30th, 2019 8:48 pm

Hello,
Thanks for developing CitNetExplorer. I'm getting started with it and I find it very useful.
I have and issue when importing data from Web of Science. I get this message: "An unexpected error has occurred (java.lang.NullPointerException). The program will be terminated". I found that excluding one of the publications (I pasted the register in this comment), the issue was solved. I identified the problematic publication by trial and error.
I've got this issue with other data, so it would be very helpful to know how to identify problematic publications. Thanks!
Note: following other comments, I excluded Early Access publications, but the issue stills.
J Polasik, M; Piotrowski, D Polasik, Michal; Piotrowski, Dariusz PAYMENT INNOVATIONS IN POLAND: THE ROLE OF PAYMENT SERVICES IN THE STRATEGIES OF COMMERCIAL BANKS EKONOMIA I PRAWO-ECONOMICS AND LAW English Article payment innovation; bank strategy; payment services; FinTech; payment card ADOPTION; CARDS This paper examines the significance of innovations in the area of payment services for strategies implemented by commercial banks in Poland. We propose a definition of payment innovations and present the evolution of their introduction in the Polish market, indicating the impact of legal regulations and the critical character of the new FinTech phenomenon. The analysis that we conducted was based on the results of a survey which obtained responses from 24 commercial banks representing almost the entire Polish retail banking sector based on the number of personal accounts maintained. The study helped to determine the main elements of the strategies implemented by banks in Poland. It also revealed the methods for competing in the area of payment services utilized by the banks, with innovative services as one of the leading elements. The results of the study indicated that there was a significant differentiation of applied strategies depending on a bank's size. In the case of larger banks, the main motivation for introducing payment innovations was characteristic of an offensive strategy, and for smaller banks - more often a defensive one. We also proposed a theoretical model for using the specific nature of payment innovations to build customer relationships and to apply cross-selling. [Polasik, Michal; Piotrowski, Dariusz] Nicolaus Copernicus Univ, Fac Econ Sci & Management, Dept Finance, Ul Gagarina 13A, PL-87100 Torun, Poland Polasik, M (reprint author), Nicolaus Copernicus Univ, Fac Econ Sci & Management, Dept Finance, Ul Gagarina 13A, PL-87100 Torun, Poland. michal.polasik@umk.pl; darius@econ.umk.pl Warsaw Institute of Banking; ALTERUM Grant [WIB/2014/01]; ALTERUM The article was funded by The Warsaw Institute of Banking and ALTERUM Grant No. WIB/2014/01. We would like to thank Anna Iwona Piotrowska and Natalia Kumkowska, who served as investigators. Moreover, we would like to thank Lech Kuklinski, Ph.D. the director of ALTERUM and director Pawel Widawski Ph.D. and Radoslaw Kotkowski from the Polish Bank Association for their support in carrying out this research project. [Anonymous], 2013, PROGRAM ROZWOJU OBRO; Arango C, 2015, J BANK FINANC, V55, P130, DOI 10.1016/j.jbankfin.2015.02.005; Bender C. M., 2011, INTERECONOMICS REV E, V46; Bikker J. A., 2002, EC FINANCIAL MODELLI; Bolt W., 2007, REV NETW ECON, V6, DOI [10.2202/1446-9022.1129, DOI 10.2202/1446-9022.1129]; Borestam A., 2011, ECB OCCASIONAL PAPER, V131; Canals J., 1999, EUROPEAN MANAGEMENT, V17, DOI [10.1016/s0263--2373(99)00047-x, DOI 10.1016/S0263--2373(99)00047-X]; Chakravorti S, 20031B2003 FED RES B; Chakravorti S, 2010, REV NETW ECON, V9; Church J, 2008, REV NETW ECON, V7, P337; Clark J. A, 1988, FEDERAL RESERVE BANK; Committee on Payment and Settlement Systems, 2012, INN RET PAYM; Dapp T., 2014, FINTECH DIGITAL R EV; Delis MD, 2010, OMEGA-INT J MANAGE S, V38, P268, DOI 10.1016/j.omega.2008.09.002; Deloitte, 2016, PAYM DISR EM CHALL E; DeYoung R., 2004, EC PERSPECTIVES, V28; DeYoung R., 2001, FEDERAL RESERVE BANK, VWP-01-06/2001, DOI [10.2139/ssrn.282721, DOI 10.2139/SSRN.282721]; Doligalski T., 2014, MODELE BIZNESU INTER; European Payments Council, 2009, EPC06606; Frazer P, 1985, PLASTIC ELECT MONEY; Gikas G., 1999, BANK KREDYT, V31; Gorka J., 2013, EFEKTYWNOSC INSTRUME, DOI [10.7172/978-83-63962-30-2, DOI 10.7172/978-83-63962-30-2]; Gorka J, 2014, P 2014 INT CASH C DE; Gostomski E, 2010, WSPOLCZESNA BANKOWOS; Gowrisankaran G, 2004, RAND J ECON, V35, P260, DOI 10.2307/1593691; Grzegorczyk T, 1997, STRATEGIE MARKETINGO; Grzywacz J, 2006, MARKETING DZIALALNOS; Hansen G, 2016, INNOWACJE BANKACH SA; Harasim J, 2013, J INNOVATION MANAGEM, V1; Harasim J, 2004, STRATEGIE MARKETINGO; Harasim J., 2011, EUROPEJSKI RYNEK PLA; Hernando I, 2007, J BANK FINANC, V31, P1083, DOI 10.1016/j.jbankfin.2006.10.011; Iwanczuk-Kaliska A, 2015, PROBL ZARZ, V13, P41, DOI 10.7172/1644-9584.54.3; Iwanicz-Drozdowska M., 2010, BANKOWOSC ZAGADNIENI; Kasiewicz S., 2013, SEKTOR BANKOWY MOTOR; Kasiewicz S, 2010, POLSKI SEKTOR BANKOW; Khiaonarong T, 2009, BANKING INNOVATION M, DOI [10.1007/978-3-7908-2333-2, DOI 10.1007/978-3-7908-2333-2]; Kisiel M, 2005, INTERNET KONKURENCYJ; Korenik D, 2002, KONKURENCYJNOSC KONK; Korenik D., 2006, INNOWACYJNE USLUGI B; Krupski R, 2009, KONCEPCJE STRATEGII; L'Hostis A, 2015, 2015 GLOBAL MOBILE B; Marcinkowska M, 2012, ACTA U LODZIENSIS FO; Marzec J., 2013, BANK KREDYT, V44; Matloka M, 2016, BANKI MOGA ZARABIAC; Mersch Yves, 2015, COMMUNICATION; Narodowy Bank Polski, 2012, PROGR RED OPL KART P; OECD/Eurostat, 2005, OSL MAN GUID COLL IN; Panowicz M., 2015, WYZWANIA BANKOWOSCI; Pawlowicz L, 2015, 602015 BAZ BANK; Pawlowska M, 2004, BANK KREDYT, V35; Payments Council European, 2009, EPC36208; Piotrowicz W, 2015, J GLOB INF TECH MAN, V18, P77, DOI 10.1080/1097198X.2015.1052684; Plooij M., 4712015 DNB, DOI [10.2139/ssrn.2602219, DOI 10.2139/SSRN.2602219]; Polasik M., 2012, INT J BANK ACCOUNT F, V4, P203, DOI DOI 10.1504/IJBAAF.2012.051590; Polasik M., 2012, 2652012 NBP; Polasik M, 2009, 2412009 NBP; Polasik M., 2016, ROZWOJ PRZEZ INNOWAC; Polasik M., 2007, BANKOWOSC ELEKTRONIC; Polasik M, 2013, INTEGRACJA EUROPEJSK; Polasik M, 2016, EKON PRAWO, V15, P103, DOI 10.12775/EiP.2016.007; Polasik M, 2015, PROBL ZARZ, V13, P102, DOI 10.7172/1644-9584.54.7; Polasik M, 2013, LECT NOTES BUS INF P, V141, P306, DOI 10.1007/978-3-642-40654-6_19; Polasik M, 2009, INT J BANK MARK, V27, P32, DOI 10.1108/02652320910928227; Rambure D., 2008, PAYMENT SYSTEMS SALT; Rochet J. C., 2006, REV NETW ECON, V5, P1, DOI DOI 10.2202/1446-9022.1085; Rochet JC, 2011, J EUR ECON ASSOC, V9, P462, DOI 10.1111/j.1542-4774.2011.01020.x; Rogers E.M., 1983, DIFFUSION INNOVATION; Rokita J., 2005, ZARZADZANIE STRATEGI; Shaw R., 2001, BANK STRATEGIES CHAL; Simon-Kucher & Partners, 2016, GLOB PRIC STUD 2014; Sokolowska E, 2015, ELECTRON COMMER R A, V14, P292, DOI 10.1016/j.elerap.2015.07.005; Spath D., 2012, EUROPEAN TREND SURVE; Stango Victor, 2004, REV NETW ECON, V3, P1, DOI DOI 10.2202/1446-9022.1040; Tunay KB, 2015, WORLD CONFERENCE ON TECHNOLOGY, INNOVATION AND ENTREPRENEURSHIP, P363, DOI 10.1016/j.sbspro.2015.06.335; Ward M., 2006, Information Security Technical Report, V11, P89, DOI 10.1016/j.istr.2006.03.001; Weclawski J., 2015, ANN UMCS SECTIO H OE, VXLIX; Wrzosek W., 2012, STRATEGIE MARKETINGO 78 2 2 3 3 UNIWERSYTET MIKOLAJA KOPERNIKA-NICOLAUS COPERNICUS UNIV TORUN WYDZIAL NAUK EKONOMICZNYCH & ZARZADZANIA, KATEDRA EKON, UL GAGARINA 13A, TORUN, 87-100, POLAND 1898-2255 2392-1625 EKON PRAWO Ekon. Prawo MAR 2016 15 1 73 101 10.12775/EiP.2016.006 29 Economics Business & Economics VH4DS WOS:000453148800006 DOAJ Gold 30/10/2019

Reply
burcu umut zan October 24th, 2019 1:42 pm

Hello,
I used to make maps via cit net explorer. after a long time this week I tried to use it but ı took a notification like this: "can not find DOI number...". After taking this notification, I read the getting started tutorial again. I got the same data set from wos. I made all the steps as in the tutorial. but again I got the same message "can not find DOI number...".Please let me know how I can solve it.
Thanks
Burcu

Reply
Frank Löffler October 18th, 2019 11:40 am

Running the current version on Debian 9.11 I get an exception:
$ java -jar CitNetExplorer.jar
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at org.pushingpixels.substance.internal.utils.SubstanceColorUtilities.getDefaultBackgroundColor(SubstanceColorUtilities.java:758)
This is using
$ java --version
openjdk 11.0.4 2019-07-16
OpenJDK Runtime Environment (build 11.0.4+11-post-Debian-1bpo91)
OpenJDK 64-Bit Server VM (build 11.0.4+11-post-Debian-1bpo91, mixed mode, sharing)
The problem sounds similar to https://github.com/Insubstantial/insubstantial/issues/56#issuecomment-333986024 where it is attributed to a bug in Substance, which I see is included in your jar.
The full log is attached:
$ java -jar CitNetExplorer.jar
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at org.pushingpixels.substance.internal.utils.SubstanceColorUtilities.getDefaultBackgroundColor(SubstanceColorUtilities.java:758)
at org.pushingpixels.substance.internal.utils.SubstanceColorUtilities.getBackgroundFillColor(SubstanceColorUtilities.java:661)
at org.pushingpixels.substance.internal.ui.SubstancePanelUI.__org__pushingpixels__substance__internal__ui__SubstancePanelUI__installDefaults(SubstancePanelUI.java:73)
at org.pushingpixels.substance.internal.ui.SubstancePanelUI.installDefaults(SubstancePanelUI.java)
at java.desktop/javax.swing.plaf.basic.BasicPanelUI.installUI(BasicPanelUI.java:62)
at org.pushingpixels.substance.internal.ui.SubstancePanelUI.__org__pushingpixels__substance__internal__ui__SubstancePanelUI__installUI(SubstancePanelUI.java)
at org.pushingpixels.substance.internal.ui.SubstancePanelUI.installUI(SubstancePanelUI.java)
at java.desktop/javax.swing.JComponent.setUI(JComponent.java:685)
at java.desktop/javax.swing.JPanel.setUI(JPanel.java:150)
at java.desktop/javax.swing.JPanel.updateUI(JPanel.java:126)
at java.desktop/javax.swing.JPanel.(JPanel.java:86)
at java.desktop/javax.swing.JPanel.(JPanel.java:109)
at java.desktop/javax.swing.JPanel.(JPanel.java:117)
at java.desktop/javax.swing.JRootPane.createGlassPane(JRootPane.java:521)
at java.desktop/javax.swing.JRootPane.(JRootPane.java:348)
at java.desktop/javax.swing.JFrame.createRootPane(JFrame.java:279)
at java.desktop/javax.swing.JFrame.frameInit(JFrame.java:258)
at java.desktop/javax.swing.JFrame.(JFrame.java:181)
at nl.citnetexplorer.app.CitNetExplorer.(Unknown Source)
at nl.citnetexplorer.app.CitNetExplorer$1.run(Unknown Source)
at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:740)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

Reply
- Ludo Waltman October 21st, 2019 9:09 am
  
  CitNetExplorer currently requires version 8 of Java. Unfortunately, it doesn't work with more recent versions of Java. Most likely this explains your problem. My recommendation is to run CitNetExplorer using Java version 8.
  
  Reply
Mahsa Samsami September 28th, 2019 8:35 am

Hi
I appreciate for developing this software firstly.
I have a problem importing data. I have received a message that was related to An unexpected error has occurred (java.lang.NullPointerException). The program will be terminated". Please let me know how I can solve it.
Thanks

Reply
- Ludo Waltman September 28th, 2019 10:30 am
  
  Most likely this is due to so-called early access publications. Please take a look at the earlier posts on this issue.
  
  Reply
Syed A. Raza July 3rd, 2019 8:20 am

Hello,
Is there way, we can other formats besides web of science into citenetexplorer software?
1. How to use SCOPUS data file into software.
2. Guidelines to use Pakej file is also not very clear
Can you please address these issues?

Reply
- Ludo Waltman July 5th, 2019 10:35 pm
  
  At the moment, CitNetExplorer does not support Scopus files and Pajek files. I am afraid we currently do not have the resources to update CitNetExplorer to provide support for these file types. Hopefully at some point in the future such an update can be made.
  
  Reply
Alexandre de Araujo June 28th, 2019 8:20 pm

Hi,
I'm starting to work with it and Web of Science data, but it only works with one file. I have around 730 publications, so I downloaded 2.txt files. When I upload them into the CitNetExplorer I got this error: "An unexpected error has occurred (java.lang.NullPointerException). The program will be terminated" and then it closes.
Thanks!

Reply
- Ludo Waltman June 30th, 2019 8:10 am
  
  This probably relates to the issue of early access publications discussed below (see my response to the question of Fernando Alguacil). My recommendation is to exclude early access publications from the data that you download from Web of Science. If this doesn't solve your problem, then feel free to send your files to citnetexplorer@cwts.leidenuniv.nl. I will then take a closer look at your problem.
  
  Reply
  - Alexandre de Araujo June 30th, 2019 4:48 pm
    
    Thanks! The problem was this.
    
    Reply
Fernando Alguacil June 11th, 2019 12:06 pm

Hi
As the previous message I have the same problem to import a merge file of five export files from WoS. How could I resolve the problem.
Thank in advance
Fernando.

Reply
- Ludo Waltman June 12th, 2019 7:48 am
  
  There is a new feature in Web of Science, so-called early access publications. If your data includes such early access publications, CitNetExplorer will not be able to process the data and will give an error message. This probably explains your problem. My recommendation is to exclude early access publications from the data that you download from Web of Science.
  
  Reply
  - Alexandre de Araújo June 30th, 2019 4:38 pm
    
    Thanks! The problem was this same.
    
    Reply
Laura Marin-Restrepo May 28th, 2019 10:14 pm

Hi,
Thank you for this software, it is very useful!
I'm starting to work with it and Web of Science data, but it only works with one file. I have around 2300 publications, so I downloaded 5 .txt files. When I upload them into the CitNetExplorer I got this error: "An unexpected error has occurred (java.lang.NullPointerException). The program will be terminated" and then it closes.
I really appreciate your help.
Thanks!

Reply
- Ludo Waltman May 29th, 2019 1:36 am
  
  Could you send your files to citnetexplorer@cwts.leidenuniv.nl? We'll then try to take a look at your problem.
  
  Reply
A Dien May 6th, 2019 8:07 pm

Hi!
Thank you for an excellent piece of software.
Will it be possible in the future to upload one paper to the software, then view the 'family tree' of citations that it uses, for each generation?
For example, if Paper A cites Papers B, C & D, the family tree would display connections from: A to B, C & D
then connections from B to all of its cited papers x,y,z
and connections from C to all of its cited papers i,u,j
etc.
Thank you kindly.

Reply
- Ludo Waltman May 6th, 2019 8:27 pm
  
  Yes, in the long term, we hope the software will evolve in such a direction. In the short term, however, I'm afraid we don't have the resources to work on this.
  
  Reply
Annie I May 4th, 2019 5:23 am

Hi,
I know I can convert Scopus files via CRExplorer and then bring them onto CitNetExplorer to use. But when I just go to CRExplorer and put my excel file, it says that there is an error in the analysis. My other excel files get this but not the one I need to use immediately for the project. Is there something about excel I am missing out on? I am saving the file as a CSV. Thank you.

Reply
- Ludo Waltman May 6th, 2019 7:46 pm
  
  Your question seems to be more about CRExplorer than about CitNetExplorer. I'm afraid I'm unable to answer your question.
  
  Reply
Ankit Sheoran April 23rd, 2019 11:32 am

Is there any way to get the most relevant research paper from the network??

Reply
Briana W February 14th, 2019 8:01 pm

Hello, I'm trying to make a citation network for about 1700 files from one publication. I've downloaded them in 500-article batches from Web of Science and saved them as .txt files. I try to upload the first .txt file to CitNetExplorer but get an error that says my "file is not valid." What am I doing wrong? Thanks!

Reply
- Ludo Waltman February 15th, 2019 11:21 pm
  
  Could you send your first file to citnetexplorer@cwts.leidenuniv.nl? We will then take a look at your problem.
  
  Reply
Zoe Bultman November 30th, 2018 9:19 pm

Hi,
I'm trying to visually differentiate between publications based on their language of publication. Is there a feature to do this in CitNetExplorer that someone could direct me to? Otherwise I've been attempting to look at my data set in excel and manually select each publication that I know to be in a certain language, which is rather inefficient. Thanks in advance!

Reply
- Ludo Waltman November 30th, 2018 10:02 pm
  
  I am afraid that CitNetExplorer doesn't provide any support for identifying the language of a publication.
  
  Reply
  - Zoe Bultman November 30th, 2018 10:09 pm
    
    Okay, thanks for your help!
    
    Reply
    - Briana W February 16th, 2019 5:06 pm
      
      I have resolved the issue. Thanks for the reply!
      
      Reply
Matteo Belletti November 19th, 2018 10:12 am

Hello! One more question: where can I find examples of "citation network patterns"? And, if is it possible, in specific reference to qualitative fields of investigation (e.g. citations patterns referring to the network made by all publication on a topic such as "social farming")
many thanks in advance
Matteo

Reply
- Ludo Waltman November 19th, 2018 5:35 pm
  
  I don't fully understand your question. What exactly do you mean by 'citation network patterns'? Perhaps the CitNetExplorer tool is more suitable for studying such patterns?
  
  Reply
  - Matteo Belletti November 20th, 2018 5:39 pm
    
    1) I apologize for my inaccuracy. I will try to explain it better:
    2) I am using (or at least I'm trying to use) CitNetExplorer!
    3) On your homepage there is written "analyzing CITATION PATTERNS in scientific literature".
    4) These are the patterns to which I refer.
    5) Is there any systematization (collection) of citation patterns?
    Matteo
    
    Reply
    - Ludo Waltman November 21st, 2018 12:24 am
      
      Thanks for the clarification! There is no systematic collection of citation patterns. 'Citation patterns' is used as a general term that refers to all kinds of structures in citation networks.
      
      Reply
      - Matteo Belletti November 21st, 2018 10:30 am
        
        I immagine it!
        ....but "hope is always the last to die" :)
        thanks Ludo!!
        matteo
        
        Reply
Matteo Belletti November 16th, 2018 12:21 pm

Hallo Ludo nice to meet you!
I tried to save a scopus data files as WOS by using crexplorer but I did not succeed.
How to do it?
kind regards!
Matteo

Reply
- Ludo Waltman November 16th, 2018 8:31 pm
  
  I have very limited practical experience with CRExplorer, but I believe this can be done using the import and export features available in the 'File' menu.
  
  Reply
  - Matteo Belletti November 18th, 2018 6:32 pm
    
    ok, finally it works. The problem was at a scopus website level...if you do not include the necessary options before saving the file in the csv format this will not properly exported (and converted of course) into the wos format.
    thanks again
    matteo
    
    Reply
    - David January 24th, 2019 5:39 pm
      
      I have the same issue. Could please specify the "necessary options" of Scopus before saving the file in the csv format. Thanks
      
      Reply
      - Mansi Maheshwari July 20th, 2019 6:54 pm
        
        What are these features that we need to take care of
        
        Reply
Lesley Skalla November 9th, 2018 6:38 pm

Hello,
I would like to create a publication map for an initial technique paper and show its subsequent citations. I think CitNetExplorer should be able to show this over time. If so, do I import the one publication of interest from WOS with a full record and cited references? I have tried this but only see the one publication and none of its citing papers. Also, what type of network map would be the most appropriate to create in VOSViewer to show the citation impact of one key publication? Thank you!
Lesley

Reply
- Ludo Waltman November 10th, 2018 5:09 pm
  
  You need to download data from Web of Science not only for your publication of interest but also for all publications citing this publication. VOSviewer is less suitable for showing the citation impact of one specific publication. Like CitNetExplorer, VOSviewer can be used to visualize citation networks of publications. However, the visualizations provided by CitNetExplorer will probably be more useful than the ones provided by VOSviewer.
  
  Reply
Viviana D'Angelo September 11th, 2018 2:38 pm

Hello! I need to use a thesaurus file in my CitNet analysis since I have some duplication of the same authors, is it possible like in VosViewer? Thank you in advance

Reply
- Ludo Waltman September 11th, 2018 7:01 pm
  
  No, in CitNetExplorer there is no support for thesaurus files. Individual publications, not authors, are the unit of analysis in CitNetExplorer. Therefore I don't think there is a strong need for thesaurus files in CitNetExplorer.
  
  Reply
Alessandro Fergnani September 4th, 2018 5:41 am

Many thanks for the great work!!! Quick question: is it possible to visualize more than 40 documents at once in the network?
thanks in advance!

Reply
- Ludo Waltman September 4th, 2018 6:42 am
  
  Yes, up to 100 publications can be visualized. Use the 'Update publications' button to increase the number of publications in the visualization.
  
  Reply
anunciano August 20th, 2018 2:59 pm

thx

Reply
Khrystyna Holynska June 14th, 2018 2:16 pm

I can't get the software to work... I get an error with the following text "Error while reading Web of Science files (my path). Cannot find author (AU) field. I checked with random files (not with the whole bunch at ones) - didn't help. Thank you in advance!

Reply
- Ludo Waltman June 14th, 2018 8:40 pm
  
  Could you please send one of your files to citnetexplorer@cwts.leidenuniv.nl? I will then take a look at your problem.
  
  Reply
Daniel O. April 24th, 2018 1:01 am

I am having trouble analyzing a large number of citations. The software churns for a while, and eventually gives an error: "Out of memory, the program will be terminated". However, my system has plenty of spare memory available, but CitNetExplorer only consumes 1.1 GB before running into issues. This is on a Win64 system.

Reply
- Ludo Waltman April 26th, 2018 10:12 am
  
  It might be that this problem is due to the use of a 32-bit version of Java. Make sure you are using a 64-bit version of Java. If this doesn't solve the problem, then please let me know.
  
  Reply
  - Daniel O. April 30th, 2018 9:35 pm
    
    Thanks, that solved the problem!
    
    Reply
Isabel Carvalho February 1st, 2018 10:41 pm

Hello Dear All
Can you help me with assistance to overcome an error that appears whenever I try to use "screenshot" to "save a map" in any of the available formats (.pdf, .png,..)?
It says "An unexpected error occurred (java.lang.UnsatisfiedLinkError: sun.awt.X11GraphicsEnvironment.initDisplay(Z)V). The program will be terminated."
It is very frustating because I loss all the adjustments that allow the perfect map to include in the paper. I am using VOSviewer as well and it works perfectly. So, what could be my problem with CitNet?
Can you help, please? Thanks.

Reply
- Ludo Waltman February 3rd, 2018 12:45 pm
  
  I assume you are working on a Mac? This is a known issue when CitNetExplorer is used on Mac systems. Unfortunately, I don't have an easy solution. My recommendation is to use a Windows system to make screenshots. In the future, we hope to fix the problem, so that screenshots can also be made on Mac systems.
  
  Reply
  - Isabel Carvalho February 24th, 2018 3:11 pm
    
    Thanks, dear Ludo.
    I am so happy that this is not a rookie problem. For the moment I will continue to work with "Grab" capture while I wait for a fix. I think that´s worth in improving a solution for Mac because there are many users.
    I like very much both CitNetExplorer and VosViewer, they are amazing, user-friendly tools that everybody can use without being an expert in scientometrics. You´ve done an amazing work!
    
    Reply
    - Roberto Lalli October 25th, 2019 10:04 am
      
      Hello all,
      I am a MAC user and wanted to know if there is now a way to overcome this problem because I cannot save the result of my research with CitNetExplorer
      Thank you very much!
      Roberto
      
      Reply
Amin Firoozabadi December 5th, 2017 4:14 pm

Dear Dr. Waltman,
I have been using both of your software for some time and they are fascinating. However, it seems that I get different result in clustering in the two software. I found that "Use external Citation Score" seems not functioning for me. When I choose external citation score, the citation score for all articles goes to Zero. I am using the software from University (Radboud). Do have any suggestion for that?

Reply
- Ludo Waltman December 5th, 2017 4:23 pm
  
  You are completely right. Due to a bug in the software, the external citation scores don't work properly. It's best not to use this option. I hope you will find CitNetExplorer useful even without being able to use the external citation scores. Of course, when the software is updated, we will fix the bug.
  
  Reply
Immo Stahl November 11th, 2017 2:18 am

is there a way to export Data from google scholar and import it into CitnetExplorer as well?

Reply
- Ludo Waltman November 11th, 2017 9:16 am
  
  Unfortunately, this is not possible. Google Scholar doesn't provide functionality for downloading citation data.
  
  Reply
  - Immo Stahl November 11th, 2017 7:05 pm
    
    So I am on my way for a solution, but I am not there yet. I have downloaded the software "publish or perish" and exportet Google scholar results via this software and saved them in the "wos" format. However, for some reason CitNetExplorer is showing the nodes but no connections between them... If I'll figure it out, i let you guys know.
    
    Reply
    - Ludo Waltman November 13th, 2017 9:39 am
      
      The difficulty is that Publish or Perish doesn't enable you to extract citation links between publications from Google Scholar. This is why CitNetExplorer shows publications, but no citation links between the publications.
      
      Reply
Emily October 12th, 2017 2:42 pm

Hello,
I'm trying to use the CitNetExplorer view instead of the Web of Science view when importing citations. I'm attempting to import the citations as a .txt file in the "Citations File" field, but I'm not sure what the "Publications" file is. What are the parameters for the "Publications File"? Is this something I have to download?
Thanks!

Reply
- Ludo Waltman October 12th, 2017 8:23 pm
  
  My suggestion is to first open a Web of Science file in CitNetExplorer and to then save the resulting citation network in a publications and a citations file. The resulting publications and citations files can be used to get a better understanding of the information that is stored in these two files. When you understand this, you may be able to create your own publications and citations files.
  
  Reply
Alamsyah Alamsyah August 14th, 2017 9:51 pm

Dear CNE,
Thank you very much to launch CitNetExplorer. I have one question for you: I do not have access to Web of Science, but I have access to SCOPUS. Would you tell me how to import bibliography from SCOPUS to CitNetExplorer. May I import .RIS file?
Thank you very much.

Reply
- Ludo Waltman August 14th, 2017 10:33 pm
  
  Please see my earlier response to a similar question asked by Gaurav Maheshwari.
  
  Reply
Subhadarsini Parida July 29th, 2017 5:25 am

Hi,
If I have a list of PDFs of journal articles. How can I conduct a co citation analysis using CitNEtExplorer?

Reply
- Ludo Waltman July 30th, 2017 7:38 am
  
  I am afraid this will be very difficult. First of all, CitNetExplorer doesn’t perform co-citation analyses. (Instead, the VOSviewer software tool could be used for such analyses.) CitNetExplorer performs only direct citation analyses. Perhaps more importantly, processing PDF files is highly challenging and CitNetExplorer doesn’t offer any support for this. (The same applies to VOSviewer.) You need to take care yourself of converting your PDF files into text files, extracting the reference strings from the text files, and identifying the citation links between documents based on the reference strings. The data obtained in this way can then be provided as input to CitNetExplorer using so-called publication and citation files. However, it is clear that this is a highly challenging process that takes a lot of effort, so I can understand that this might not be what you have in mind.
  
  Reply
Hanh La May 1st, 2017 12:12 pm

* Are networks constructed by CitNetExplorer based on DOI?
If a publication that does not have a DOI, does it appear in network visualisation?
* Does CitNetExplorer work well with 64 bit Windows system? What is the minimum requirement for RAM? I tried to visualize a network of more or less 100,000 publications in Windows 10, but failed. The error is either "Out of memory" or "File is empty". Could you help? Thank you!

Reply
- Ludo Waltman May 4th, 2017 8:28 am
  
  No, networks are not constructed (exclusively) based on DOI. Other data elements are taken into account as well. For more information, please see Section 4.1 in the following paper: https://doi.org/10.1016/j.joi.2014.07.006 (http://arxiv.org/abs/1404.5322).
  CitNetExplorer should work well on 64 bit Windows systems. There is no clear minimum amount of memory that is required by the software. The larger the amount of memory you have available, the larger the data sets that can be handled by the software. The 'file is empty' error message probably is caused by the problem discussed below in my response to the question of Alderasus.
  
  Reply
Alderasus May 1st, 2017 3:30 am

Dear CitNetExplorer team,
First of all, I hope that everyone is fine and many thanks for your appreciated efforts.
I am trying to use CitNetExplorer, however, every time I try to upload text file of the citations by following your instructions I got an error that said: Error while reading web of science file 'path': File is empty. Could you please help me with such issue? Thank you in advance.
Best wishes,
Alderasus

Reply
- Ludo Waltman May 4th, 2017 8:23 am
  
  Thanks for raising this issue. We have investigated it. There currently turns out to be a problem with the download feature of Web of Science. Because of this problem, files downloaded in the so-called tab-delimited file format cannot be opened by CitNetExplorer. They cause a 'file is empty' error message. We are in contact with Web of Science and they are trying to fix the problem. The problem should be fixed within the next one or two weeks. Most likely, this problem explains why you are getting an error message.
  A workaround is to use the so-called Web of Science plain text file format. This format can also be handled by CitNetExplorer and it doesn't suffer from the above problem.
  
  Reply
  - Ludo Waltman May 9th, 2017 9:20 pm
    
    The problem with the Web of Science file download has been fixed by Clarivate Analytics. Tab-delimited files downloaded from Web of Science now can be provided as input to CitNetExplorer without problems.
    
    Reply
    - Aleks S November 1st, 2017 2:54 am
      
      Dear Dr. Waltman,
      I tired today using both the delimited tab file and the plain txt file in Java version of the program. I am getting the same error. Is there a chance this error reappeared in Web of Science?
      
      Reply
      - Ludo Waltman November 1st, 2017 4:15 pm
        
        I just performed some tests. I don't believe the problem has reappeared in Web of Science, so I am not sure why you are getting an error. Please feel free to send me your files by e-mail. I will then try to take a look at them and to give you some advice.
        
        Reply
paola moscoso February 21st, 2017 12:38 pm

Hello,
Great free tool. One question, which is the minimum number of references needed for running the clustering option? I am trying with different options but it appears that due to minimum size requirement they can't be clustered. Do you have any additional tutorial or recommendation for managing other options that are not explaining in this tutorial (e.g. I am trying to find the option for connecting the lines between nodes, but I just don't find it!-as Ian below-).
Many thanks,
Paola

Reply
Gaurav Maheshwari December 6th, 2016 8:21 am

Hello!
Does this support the data extract from Scopus database. Is there any way to use the Scopus data for citation analysis.
Thanks
Best regards
Gaurav

Reply
- Ludo Waltman December 10th, 2016 4:21 pm
  
  Unfortunately, CitNetExplorer doesn't yet offer Scopus support. However, there is a workaround. You can use another tool, CRExplorer (available at www.crexplorer.net), to open your Scopus data files and to save them as Web of Science data files. The Web of Science data files that you have obtained in this way can be opened by CitNetExplorer. In this indirect way, CitNetExplorer can work with Scopus data.
  
  Reply
  - Matteo Belletti November 16th, 2018 11:58 am
    
    Hallo! I tried to save a scopus data files as was by using crexplorer but I did not succeed.
    How to do it?
    kind regards!
    Matteo
    
    Reply
    - Matteo Belletti November 16th, 2018 12:00 pm
      
      I apologize for the mistake: ....as WOS data file.....
      Matteo
      
      Reply
Ian October 20th, 2016 4:59 am

Great program, the connecting lines between nodes seem to have disappeared on my visualization. I can't work out how to bring them back. Any advice much appreciated.
Thanks

Reply
Silvia Vicente August 29th, 2016 11:01 am

Some references could be very old and do not right include (Annonymus). Could we introduce changes in the publication list to rename the reference?

Reply
- Ludo Waltman August 30th, 2016 11:08 pm
  
  Assuming that you are working with data downloaded from Web of Science, you could edit the Web of Science files using a text editor. In that way, you can make changes to the references. However, this is quite complex and this needs to be done in an extremely accurate way, otherwise CitNetExplorer will no longer be able to process the Web of Science files.
  Alternatively, after you have loaded a citation network in CitNetExplorer, you can save it using the 'Save' button. You will obtain two files, a publications file and a citations file. You can edit the publications file using a text editor (or using a spreadsheet program such as MS Excel) and you can then make changes to the data on individual publications.
  
  Reply
  - Silvia August 31st, 2016 12:31 am
    
    Thank you! I'm working with WOK - essential colection ok. Your solution concerns me because I fix several *.txt files (exportation is in groups of 5) and I have to do it by hand because in MsDos do not work for the initial headlines. The reference is old but I' ll try to do it because the year woukd be easy to find. Thanks!!
    
    Reply
Alex April 8th, 2016 7:27 am

Hello! I enjoy the idea of the software presented here, but when I attempt to save my records of interest from Web of Science, I am unable to download reference information. The dropdown menu for Record Content is only "Author, Title, Source" and "Author, Title, Source, Abstract", and the "Full Record and Cited References" option has been evidently removed.
What can I do to still use CitNetExplorer?
Thanks for any insights!
Alex

Reply
- George April 8th, 2016 10:52 am
  
  Dear Alex,
  I can still see these options on the web of science ISI. After selecting an article, click on Save to other file formats (dropdown bar on top of the article title) and then on the pop up window select Full record and cited references from Record Content and then tab delimited-Win on the file format for the extraction on a txt format.
  Hope that helps, George
  
  Reply
- Nees Jan van Eck April 8th, 2016 1:24 pm
  
  Alex, most likely you are not using the Web of Science Core Collection. When you go to the online Web of Science, by default the ‘All Databases’ option is selected. You need to change this into ‘Web of Science Core Collection’. I expect that this will solve your problem.
  
  Reply
  - Nils Kvilvang May 1st, 2016 6:06 pm
    
    HI - I experienced the same problem. I do, however, think that it could also be dependent on what access your insitution have (?). I tried through two institutions, both have access to Web of Science. Through one of them, I had the same problem - there was no "Full record..." option. I struggled a lot with this, but when I tried accessing through the other institution, it was readily there. SO, I don't know if there are different services bought from the two institutions, but there was a difference...
    
    Reply
chad March 9th, 2016 3:24 am

I imported a bunch of records from Web of Science which have definite citation relations among them.
But no citation links are showing up
Why is that?

Reply
- chad March 11th, 2016 12:10 am
  
  I looked at the way I imported the records from Web of Science and realized I had made a mistake.
  I had left the citation data out.
  I just did a full import of all the fields from WOS and now it works :)
  
  Reply
Juan March 1st, 2016 7:57 pm

Does anyone casually have any macro for exporting scientometric / bibliometric entities from VantagePoint software to CitNetExplorer so that citation trees can be created?
I do have one macro for exporting from VantagePoint to VOSViewer which I obtained from VantagePoint Institute webpage (MakeVOSfromatrix.vpm).
Otherwise I will have to program one myself by VBA scripting :-)
Thank you :-D

Reply
George February 8th, 2016 10:21 am

Hello, thanks for providing such a useful tool! I d like to ask you about articles or Ebooks that are not available on WebofScience such as OECD reports or Word bank articles. Is there any way that I can include these in my network?
Thanks in advance,
George

Reply
- Nees Jan van Eck February 8th, 2016 4:31 pm
  
  Unfortunately there is no easy solution to this. OECD reports, Word Bank articles, and other publications that are not available in Web of Science cannot easily be included in a citation network that is analyzed using CitNetExplorer. If you want them to be included, you need to do your own processing of the references contained in these publications. You can then create your own publications and citations files and these files can be opened by CitNetExplorer. In this way, publications not available in Web of Science can be analyzed using CitNetExplorer, but it may take quite a lot of effort to preprocess the data in such a way that it can be used as input for the software. Please note that, if the ‘Include non-matching cited references’ option is turned on in CitNetExplorer, publications not available in Web of Science can be included in a citation network that is analyzed using CitNetExplorer if these publications occur sufficiently often (10 times by default) in the reference lists of other publications that are available in Web of Science.
  
  Reply
  - George February 8th, 2016 4:47 pm
    
    Thanks for the reply! I checked that option and also changed the minimum number to 3. However, I get some new references with anonymous author name or not available source. Do you have any recommendation for that?
    Thanks,
    George
    
    Reply
    - Nees Jan van Eck February 9th, 2016 12:56 pm
      
      Probably you are encountering the following issue. Cited references in Web of Science include only limited information. For instance, they include the name of the first author only, not of other authors, and they do not include the title of an article. For this reason, when cited references are included in a citation network that is analyzed using CitNetExplorer, some data elements are usually missing.
      
      Reply
      - george February 9th, 2016 12:58 pm
        
        Fair enough, thanks for the support.
        George
        
        Reply
Suggestion December 9th, 2015 6:19 pm

It would be a great idea to make in the future the software open source so that people can colaborate and make it even better :D

Reply
Josetxo December 7th, 2015 1:04 pm

Thank you :-)
Excellent software.
It helped me a lot with my University work.

Reply
kathryn June 9th, 2015 2:44 pm

hallo- kathryn again. Could you tell me if there's a way to merge publications if they are duplicates?
thanks
Kathryn

Reply
- Nees Jan van Eck June 10th, 2015 12:51 pm
  
  Merging duplicate publications is not possible in CitNetExplorer. There is a solution, but this solution is somewhat technical. In CitNetExplorer, you can save a citation network into a publications and a citations file. These are simple text files that can be edited using a text editor or using a spreadsheet program such as Excel. In the publications file, each line represents a publication. If you want to merge two publications, you need to remove the line corresponding with one of the two publications. In the citations file, each line represents a citing link between a citing and a cited publication. After removing a publication from the publications file, you need to update the citations file in order to make sure that there are no citation links for which either the citing or the cited publication has been removed. Such citation links need to be updated. For instance, if the citing publication has been removed, it needs to be replaced by the corresponding duplicate publication.
  
  Reply
YOO March 23rd, 2015 9:53 am

Very interesting tool :)
One question: I can't download citation data of Web of Science. I know that CitNetExplorer has its own file format. where can I find CitnetExplorer's format?
can I use it easyily?

Reply
David December 16th, 2014 7:54 pm

Very useful tool. Do you have any other tips for extracting citation information from Web of Science? Two examples of trouble I've experienced with sending WoS information to a file:
1. If I send the information for a single article to a file, the cited references fields in the output file don't contain all information (e.g. the title isn't included).
2. If I browse from the page displaying a single article to the list of cited references (for me, there's a link on the right side of the page labeled 'X cited references'), I no longer have the option to save 'Full Record and Cited References' from the dropdown. I don't see anything relating to the "Core Collection" you mention below. Interestingly, browsing to the page displaying articles which cite the current article does allow me to export 'Full Record and Cited References'.
This would be useful for constructing a "forward and backward" citation network.
Thanks!

Reply
- Ludo Waltman December 18th, 2014 1:02 pm
  
  1. In Web of Science, when saving bibliographic data into a file, only partial information about cited references will be available. For instance, only the first author of a cited reference will be listed. Also, the title of a journal article will not be listed. The journal name, on the other hand, will be included.
  2. When you look at the list of the cited references of a publication in Web of Science, it is indeed not possible to save these cited references. In Web of Science, you can save bibliographic data on publications included in Web of Science. This will then also include some data on the cited references of these publications. Directly saving the cited references is not possible. Please note that, when CitNetExplorer constructs a citation network based on Web of Science files, cited references occurring in a sufficiently large number of publications (by default 10) will be included in the citation network (with incomplete data, so only first author and no title).
  
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Andrea October 28th, 2014 11:53 am

Very interesting tool!
One question: is it possible to use other referencies sources, like scopus?
Or the input file must be a specific one?
Many thanks
Andrea

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- Nees Jan van Eck October 29th, 2014 9:30 am
  
  CitNetExplorer does not offer support for processing Scopus files. This is a feature that may be added in the future, although we have no concrete plans for this at the moment. Currently CitNetExplorer offers support only for processing Web of Science files. CitNetExplorer also has its own file format. This file format can be used to input Scopus data into CitNetExplorer, but you then need to do a lot of preprocessing yourself, which can be quite complex.
  
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Adalberto Brant August 1st, 2014 4:40 am

Thanks for the tool I am newbie and found the tool more easy to use than pajek , gephi and vosviewer.
It is possible to look for the journal name steady of author ??? How could I do it ?
Thks

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- Ludo Waltman August 1st, 2014 4:15 pm
  
  In the visualization of a citation network, CitNetExplorer has the restriction that publications can be labeled only using an author name, not using the title of the journal in which they have appeared. You can choose between the last name of either the first or the last author of a publication. When searching for publications on the 'Publications' tab in CitNetExplorer, it is possible to search based on journal title.
  
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Lorenz Hauser June 6th, 2014 1:39 am

This looks like a very useful program. However, WoS has a download limit of 500 citations - what if I want to download more than that? Can input files be combined?
Thanks

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- Ludo Waltman June 6th, 2014 7:38 am
  
  Yes, input files can be combined. You can simply download from Web of Science as many files as you need in order to cover all publications that you are interested in. All downloaded files can then be opened simultaneously in CitNetExplorer. In the file chooser dialog box in CitNetExplorer, you can select multiple files by clicking on them while pressing the CTRL key.
  
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  - Hanh La January 23rd, 2017 2:08 pm
    
    After downloading many files, I opened them simultaneously, but only a part of them are visualised. For example, my dataset contains publications from 1980 to 2017, but only the publications from 2013 to 2017 are visible.
    Do you have any idea about this? I downloaded them in the same format before.
    
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Tim Evans May 7th, 2014 5:48 pm

Looks like a very interesting piece of software. I like the use of java to make it cross-platform friendly and it loaded perfectly on my Windows machine. I gave it my usual 15 minutes for any new software. The tutorial is very good for that first go but in my case I ran into a problem. The Web of Science licence here at Imperial appears not to let me download the citations of selected papers (just author, title, source and abstract) so I couldn't go any further. Perhaps an example input file you know works could be provided at a later date? Usually I would give up on software if I don't get anywhere pretty quickly but in this case it looks really useful so will give this more time when I get a chance. If I can construct some input files using open access data I will pass it along.

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- Ludo Waltman May 10th, 2014 11:28 am
  
  Thanks Tim for your feedback on CitNetExplorer. Did you select the 'Web of Science Core Collection' database? Usually, when people have problems downloading citation data, they are working in the 'All Databases' mode rather than the 'Web of Science Core Collection' mode. Using the 'All Databases' option, it is indeed not possible to download citation data.
  
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- Sara June 25th, 2015 11:51 am
  
  I 'd really like to get this to work, too. You don't include any information about connecting to a citation database. I can only access WoS through my university's VPN in a browser. I have no idea how to tell your program how to get behind it. What am I supposed to do?
  I can't imagine I am alone here with this. And what is with Google Scholar? That would be sort of obvious, wouldn't it.
  In any case I succeeded in importing my bib from Citavi, (more or less), but I just can't move on from there.
  Surely this is not supposed to be a solution only for people that are physically working on machines within university networks....?
  
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