Use this if you are using igraph from R
graph_from_incidence_matrix
creates a bipartite igraph graph from an incidence
matrix.
graph_from_incidence_matrix( incidence, directed = FALSE, mode = c("all", "out", "in", "total"), multiple = FALSE, weighted = NULL, add.names = NULL ) from_incidence_matrix(...)
incidence |
The input incidence matrix. It can also be a sparse matrix
from the |
directed |
Logical scalar, whether to create a directed graph. |
mode |
A character constant, defines the direction of the edges in
directed graphs, ignored for undirected graphs. If ‘ |
multiple |
Logical scalar, specifies how to interpret the matrix elements. See details below. |
weighted |
This argument specifies whether to create a weighted graph
from the incidence matrix. If it is |
add.names |
A character constant, |
... |
Passed to |
Bipartite graphs have a ‘type
’ vertex attribute in igraph,
this is boolean and FALSE
for the vertices of the first kind and
TRUE
for vertices of the second kind.
graph_from_incidence_matrix
can operate in two modes, depending on the
multiple
argument. If it is FALSE
then a single edge is
created for every non-zero element in the incidence matrix. If
multiple
is TRUE
, then the matrix elements are rounded up to
the closest non-negative integer to get the number of edges to create
between a pair of vertices.
A bipartite igraph graph. In other words, an igraph graph that has a
vertex attribute type
.
Gabor Csardi csardi.gabor@gmail.com
make_bipartite_graph
for another way to create bipartite
graphs
inc <- matrix(sample(0:1, 15, repl=TRUE), 3, 5) colnames(inc) <- letters[1:5] rownames(inc) <- LETTERS[1:3] graph_from_incidence_matrix(inc)