hyperg: A wrapper for the fixedrow function

In KGodard1/Fastball-SourceCpp: Extracts the Backbone from Weighted Graphs

Description

'hyperg' computes the probability of observing a higher or lower edge weight using the hypergeometric distribution. Once computed, use backbone.extract to return the backbone matrix for a given alpha value.

Usage

hyperg(B)

Arguments

B	graph: An unweighted bipartite graph object of class matrix, sparse matrix, igraph, edgelist, or network object. Any rows and columns of the associated bipartite matrix that contain only zeros are automatically removed before computations.

Details

Specifically, this function compares an edge's observed weight in the projection B*t(B) to the distribution of weights expected in a projection obtained from a random bipartite graph where the row vertex degrees are fixed but the column vertex degrees are allowed to vary.

Value

fixedrow

References

Tumminello, Michele and Miccichè, Salvatore and Lillo, Fabrizio and Piilo, Jyrki and Mantegna, Rosario N. 2011. "Statistically Validated Networks in Bipartite Complex Systems." PLOS ONE, 6(3), doi: 10.1371/journal.pone.0017994

Neal, Zachary. 2013. “Identifying Statistically Significant Edges in One-Mode Projections.” Social Network Analysis and Mining 3 (4). Springer: 915–24. doi: 10.1007/s13278-013-0107-y

Examples

hyperg_probs <- hyperg(davis)

KGodard1/Fastball-SourceCpp documentation built on Dec. 18, 2021, 2:35 a.m.