Add and retrieve igraph structure of snapshot

mem_igraph() retrieves the igraph structure of snapshot. The igraph structure is cached inside snapshot by side effect to avoid recomputing it multiple times.

Usage,

mem_igraph(snapshot)

Arguments

snapshot

A memtools snapshot.

Details

The igraph is ordered according to the original data frame ordering. Rearranging the rows of snapshot does not rearrange the igraph.

Examples

s <- mem_snapshot(list(1, list(2)))
#> Creating snapshot...
#> Computing dominance and retainment...
#> Creating data frame...

# Retrieve the igraph. It is first computed and then cached inside
# the snapshot so it does not need to be recreated again.
g <- mem_igraph(s)
#> Adding igraph structure to snapshot as `mem_igraph` attribute...

# Work with igraph
igraph::gsize(g)
#> [1] 3