Returns a vector showing the enrichment in protein interactions in various positions of the list of genes in input.
In practice, a list of 3 vectors is returned:
1) enrichment (i.e. enrichment computed in the window from 1 to x)
2) enrichmentWindow (i.e. enrichment computed in a sliding window of size determined by the "edgeWindow" parameters
and the sliding steps determined by the "sliceWindow" parameter)
3) enrichmentWindowExtended (i.e. like the enrichmentWindow,
but it also includes an initial window of size "windowExtendedReferenceThreshold" with respect to which to compute the enrichment )