visualization of international collaboration in science

Loet Leydesdorff loet at LEYDESDORFF.NET
Thu May 10 06:26:19 EDT 2007

IntColl.exe  <> for
International Collaboration Analysis 


This program enables one to generate a representation of the international
coauthorship relations in a document set in terms of the countries of
coauthors. Input is a set saved using ISI's Web of Science, and outputs are:


1. cosine.dat provides an input file for Pajek as a visual representation of
the international collaboration network among the authors within this set.
The matrix is normalized using the cosine.

2. coocc.dat and matrix.dbf are the files which underly cosine.dat.
Coocc.dat is the file before normalization; and matrix.dbf the asymmetrical
data matrix. The latter file can be used for statistical analysis in SPSS,
the former for graph-analytical analysis using UCINet or Pajek.

3. Like ISI.EXE, the program IntColl.EXE produces four databases containing
the information in the original input set in relational format: au.dbf with
the authors; cs.dbf with the address ("corporate sources"); core.dbf with
information which is unique for each record (e.g., the title); and cr.dbf
containing the cited references. The files are linked through the numbers in
core.dbf. If one needs only these files, one is advised to use ISI.EXE,
since the computation of the cosine is computer intensive, and therefore


The routine creating the matrix and the cosine-normalized output uses the
country names in the file cs.dbf as variable names, and the records in
core.dbf as the cases (rows). The number of documents is unlimited. The
country names can be edited in the output files using an ASCII editor (e.g.,



Loet Leydesdorff 
Amsterdam School of Communications Research (ASCoR)
Kloveniersburgwal 48, 1012 CX Amsterdam
Tel.: +31-20- 525 6598; fax: +31-20- 525 3681 
 <mailto:loet at> loet at ;

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