spraphal: Sparse Graph-based Analysis

Add vertices to a list based on p-value cutoff / enrichment

1	append_by_enrich(G, v1, v2, cutoff, collect = FALSE)

`G`	igraph which contains vertex identifiers present in 'v1' and 'v2'.
`v1`	vector of vertex identifiers. This list will be added to from 'v2' if there are any vertices passing the enrichment criteria.
`v2`	vector of vertex identifiers to potentially add to 'v1'.
`cutoff`	numeric. Cutoff enrichment value (p-value) for which to add vertices from 'v2' to 'v1' the list.
`collect`	logical. If TRUE, the output will contain a listed object with the names of 'adjusted_list' and 'remaining_vertices'.