def correlation_enrichment(cxs):
"""
Get the scored array for evaluating correlation of interactions within and
between the provided set of complexes. Use this as base_exs for
ppi.feature_array().
"""
pdtrain, splits = ex.base_examples_single(cxs, cxs, cxs, [0, 1])
ntest_pos = len([v for k, v in pdtrain.d.items() if v[0] == 1])
base_exs = Struct(pdtrain=pdtrain, splits=splits, ntest_pos=ntest_pos)
return base_exs
