Analysis and visualization of very large networks     

Recommended on FDM
Ver. 32 bit 64 bit
Sep 1,
Web Start
Pajek Web Start  PajekXXL Web Start
Install Shield
Web Start
Pajek Web Start PajekXXL Web Start Pajek3XL Web Start
Install Shield
2018 Pajek Book Edition 3
Pajek mailing list        Datasets
Richards Software Award 2013
Greek Chinese Russiane Spanish Persian Japan French Great Britain Portuguese German lithuanian Italia Poland Slovene
Pajek Manual Exploratory Social Network Analysis with Pajek: Revised and Expanded Edition for Software Update. Third Edition. Exploratory Social Network Analysis with Pajek - in Japanese. Exploratory Social Network Analysis with Pajek - in Chinese.

What is new in Pajek 5.14?

Sep 1, 21 Pajek 5.14: Bug when generating directed scale free networks fixed (Network / Create Random Network / Scale Free / Directed and Network / Create Random Network / Scale Free / Acyclic).
Jul 1, 21 Pajek 5.13: Problem with disconnected communities obtained sometimes by community detection methods (Louvain Method and VOS Clustering) fixed. Obtained communities are now always connected.
Jun 21, 21 Operations / Network + Partition / Refine Partition speeded up significantly.
May 25, 21 Pajek 5.12: Exporting matrices and dendrograms to SVG and PDF and exporting layouts to PDF updated according to the latest changes in Inkscape 1.1.
May 24, 21 File / Date-Time added to Report window main menu: Display current date and time in Report window.
Apr 23, 21 Export / 2D / SVG / Create PDF also added: Whenever layout is exported to SVG also corresponding PDF is created.
Apr 11, 21 Vector / Transform / Normalize / [Number of Vertices, Number of Vertices - 1] added.
Apr 8, 21 Network / Create New Network / Transform / Line Values / Divide by and Vector / Transform / Divide by added.
Jan 10, 21 Wheat and PajekGreen added as two additional known colors in Pajek visualizations.
Dec 1, 20 SVG Background Opacity added to Export / Options. Example.
Nov 1, 20 Pajek 5.11: ...Complete history since November 15, 1996...

Some hints on Pajek

  Start with the latest version of Pajek

       Changes in main menu structure from Pajek book edition (2.05) to the latest version of Pajek
       Start with Pajek, Test Datasets, More Datasets
       Course on Social Network Analysis with Pajek, supporting programs

  Running Pajek on MAC and Linux

      Running Pajek on MAC, Addition1, Addition2
      Running Pajek on Linux
      Running Pajek on Linux64

  Info on Pajek / Introduction to Pajek in different languages

       English: by Andrej Mrvar and Vladimir Batagelj
       Russian: Videos (by Daria Matseva)
       Italian: by Fernanda Strozzi
       Persian: by Aliakbar Akbaritabar
       Greek (by Dimitrios Rousis): Presentation, Manual
             1. Videos (by Michael Henninger): 1, 2, 3
             2. by Vladimir Batagelj and Andrej Mrvar
             1. by Marion Maisonobe
             2. by Pierre Mercklé
             1. by Universidad Nacional del Sur (Argentina)
             2. by Alejandro A. Ruiz León and Nina Ines Jung
             1. Videos (by Rafael Barbastefano): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
             2. by Ivette Luna
             3. by Andre M. Sarmento
             1. Videos: 1.1, 1.2, 2.1, 2.2, 3, 4.1, 4.2, 5.1, 5.2, 6.1, 6.2, 6.3.
             2. by Feng Lin
             1. by Japan Advanced Institute of Science and Technology
             2. by Yuki Yasuda and Takahisa Wakabayashi
             1. by Dominik Kopaczek
             2. by Dominik Batorski
             3. laboratorium-pajek-1
             4. laboratorium-pajek-2
       Lithuanian: by Gintarė Tautkevičiėnė
             Pajek manual (by Andrej Mrvar)
             Course on Social Network Analysis with Pajek (by Andrej Mrvar)
             Pajek - 20 years (by Andrej Mrvar)

  PajekXXL and Pajek3XL: About, Example 1, Example 2

  Community Detection in Pajek and PajekXXL

      Detecting communities in Pajek and Pajek XXL
      Visualizing communities in Pajek
      Comparing Louvain method and VOS Clustering
      Example of visualizing communities in collaboration network (provided by James Moody)

  Signed Networks in Pajek

      Papers, visualizations, animations, instructions...

  Analysis of Genealogies with Pajek

      Papers, presentations, fragments, macros...

  Analysis of Citation Networks

      Main path analysis (Wikipedia)
      How to use Pajek to find main path (Video)

  Using Unicode, LOG and MCR files

       Using Unicode in Pajek
       Macros and session (LOG) files

  SVG, EPS and VOS Visualizations

       Exporting Visualizations to VOSviewer
       Example of using Tooltips in SVG export
       Bezier curves as default shapes of lines in Pajek
       Animations of the Correlates of War data
       Some visualizations with symbols
       Drawing edges and arcs transparently in Pajek
       Drawing vertices transparently in Pajek
       Solving the problem of unwanted visibility of lines behind transparent vertices in Pajek
       house, man, and woman as additional shapes

  Supporting programs

       PajekToSvgAnim (by Darko Brvar): Zip (version, December 18, 2018), TestData, Manual
       txt2Pajek (by Juergen Pfeffer): Create Pajek files from text files (version 3)
       R functions (by Jonathan H. Morgan): Read and write Pajek files without calling another networks package
       NeuroData's Graph Database Online converter among several network formats (including Pajek)
       Web Crawlers with export to Pajek: SocSciBot, UrlNet
       socilab (by Craig Tutterow): Visualize your LinkedIn Network and save it as Pajek NET file
       Visual History for Chrome (by Samer Kurdi): Chrome extension that presents URLs visually,
           as an interactive chart and saves it as Pajek NET file. Download

Recommended on FDM

  Questions regarding Pajek

       Pajek mailing list