retworkx.digraph_adjacency_matrix¶
- digraph_adjacency_matrix(graph, /, weight_fn=None, default_weight=1.0)¶
Return the adjacency matrix for a PyDiGraph object
In the case where there are multiple edges between nodes the value in the output matrix will be the sum of the edges’ weights.
- Parameters
graph (PyDiGraph) – The DiGraph used to generate the adjacency matrix from
weight_fn (callable) –
A callable object (function, lambda, etc) which will be passed the edge object and expected to return a
float
. This tells retworkx/rust how to extract a numerical weight as afloat
for edge object. Some simple examples are:dag_adjacency_matrix(dag, weight_fn: lambda x: 1)
to return a weight of 1 for all edges. Also:
dag_adjacency_matrix(dag, weight_fn: lambda x: float(x))
to cast the edge object as a float as the weight. If this is not specified a default value (either
default_weight
or 1) will be used for all edges.default_weight (float) –
- If
weight_fn
is not used this can be optionally used to specify a default weight to use for all edges.
- return
The adjacency matrix for the input dag as a numpy array
- rtype
numpy.ndarray
- If