extract_highlevel: Extract the high level of a multilevel network
Description
Extract one of the three levels of a multilevel network.
extract_highlevel will extract the higher level vertices and the
edges between them, extract_lowlevel will extract the lower level
vertices and the edges between them. On the other hand,
extract_mesolevel will extract all the vertices but only the edges
between vertices from different levels.
Usage
extract_highlevel(x)
Arguments
x
a graph object. Must be a multilevel network.
Value
extract_highlevel and extract_lowlevel
return a 1-mode network. All
the vertices in the selected level and the edges between them.
extract_mesolevel returns a bipartite (2-mode) network.
All the vertices
are kept. Only edges between vertices of different levels are kept. This
is what the literature also calls an affiliation network.