This function calculates the two-mode clustering coefficient as proposed by Opsahl (2010).
clustering_tm(net, subsample=1, seed=NULL)A binary or weighted two-mode edgelist
Whether a only a subset of 4-paths should we used when calculating the measure. This is particularly useful when running out of memory analysing large networks. If it is set to 1, all the 4-paths are analysed. If it set to a value below one, this is roughly the proportion of 4-paths that will be analysed. If it is set to an interger greater than 1, this number of ties that form the first part of a 4-path that will be analysed. Note: The C++ functions are better as they analyse the full network.
If a subset of 4-paths is analysed, by setting this parameter, the results are reproducable.
Returns the outcome of the equation presented in the paper
Opsahl, T. 2010. Triadic closure in two-mode networks: Redefining the global and local clustering coefficients. arXiv,1006.0887