[Sigmetrics] The Measurement of Diversity in Networks

[Loet Leydesdorff]

The Measurement of Diversity in Networks <http://www.leydesdorff.net/software/diversity/index.htm> 

 

The routine net2rao.exe—available at http://www.leydesdorff.net/software/diversity/net2rao.exe —reads a network in the Pajek format (.net) and generates the files rao1.dbf and rao2.dbf. 

Rao1.dbf contains diversity values for each of the rows (named here “cited”) and each of the columns (named “citing”). Rao2.dbf is needed for the computation of cell values (see here below). 

 

The input file is preferentially saved by Pajek so that the format is consistent. Use the standard edge-format. The user is prompted for the name of this .net-file. The output contains the values of both Rao-Stirling diversity and so-called "true" diversity (labels: “Zhang_ting” and “Zhang_ted”; see Zhang et al., 2016; cf. Jost, 2006).

 

By changing the default “(N)o” into “(Y)es” in the opening screen, one can make the program write two files, “res_ting” and “res_ted”, containing detailed information for each pass. These files may grow rapidly in size (> 1 GB). All files are overwritten in later runs; one is advised to save them under other names or in other folders. 

 

References

Jost, L. (2006). Entropy and diversity. Oikos, 113(2), 363-375.

Leydesdorff, L., Wagner, C. S., & Bornmann, L. (in preparation). Interdisciplinarity at Different Levels of Aggregation: Betweenness and Diversity in Journal Citation Networks. 

Stirling, A. (2007). A general framework for analysing diversity in science, technology and society. Journal of the Royal Society Interface, 4(15), 707-719. 

Zhang, L., Rousseau, R., & Glänzel, W. (2016). Diversity of references as an indicator for interdisciplinarity of journals: Taking similarity between subject fields into account. Journal of the American Society for Information Science and Technology, 67(5), 1257-1265. doi: 10.1002/asi.23487

  _____  

Loet Leydesdorff 

Professor, University of Amsterdam
Amsterdam School of Communication Research (ASCoR)

 <mailto:loet at leydesdorff.net> loet at leydesdorff.net ;  <http://www.leydesdorff.net/> http://www.leydesdorff.net/ 
Associate Faculty,  <http://www.sussex.ac.uk/spru/> SPRU, University of Sussex; 

Guest Professor  <http://www.zju.edu.cn/english/> Zhejiang Univ., Hangzhou; Visiting Professor,  <http://www.istic.ac.cn/Eng/brief_en.html> ISTIC, Beijing;

Visiting Fellow,  <http://www.bbk.ac.uk/> Birkbeck, University of London; 

 <http://scholar.google.com/citations?user=ych9gNYAAAAJ&hl=en> http://scholar.google.com/citations?user=ych9gNYAAAAJ&hl=en

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