compute_custom_modularity function

Function to compute the custom modularity of a citation graph over a time window.

This function computes custom modularity of the citation graph. Custom modularity here stands for Newman's modularity computed over the subgraph comprising nodes that belong to a single corpus only and are within the time window, as well as direct outgoing neighbors of the former nodes (whatever their year tag). Basically, the citation graph considered thus includes publications within the time window as well as older papers that they cite.

compute_custom_modularity(gr, infLimitYear, supLimitYear)

Arguments

• gr: Citation graph
• infLimitYear: Start year of the time window considered (included)
• supLimitYear: End year of the time window considered (excluded)

Returns

Returns the custom modularity value of the subgraph restricted to the interval [infLimitYear;supLimitYear[.

Author(s)

Christian Vincenot (christian@vincenot.biz)

See Also

compute_modularity, plot_modularity_timeseries

Examples

labels<-c("Corpus1","Corpus2")

# Build a bibliographical dataset from Scopus exports
db<-create_bibliography(corpora_files=c(tempfi1,tempfi2), 
                        labels=labels, keywords=NA)

# Build graph
gr<-build_graph(db=db,small.year.mismatch=TRUE, attrs=c("Corpus","Year","Authors"), nb.cores=1)

# Compute Custom Modularity
compute_custom_modularity(gr, 1990, 2018)