scipy.sparse.csgraph.

csgraph_to_masked#

scipy.sparse.csgraph.csgraph_to_masked(csgraph)#

Convert a sparse graph representation to a masked array representation

Added in version 0.11.0.

Parameters:

csgraphcsr_array, csc_array, or lil_array: Sparse representation of a graph.

Returns:

graphMaskedArray: The masked dense representation of the sparse graph.

Examples

>>> from scipy.sparse import csr_array
>>> from scipy.sparse.csgraph import csgraph_to_masked

>>> graph = csr_array( [
... [0, 1, 2, 0],
... [0, 0, 0, 1],
... [0, 0, 0, 3],
... [0, 0, 0, 0]
... ])
>>> graph
<Compressed Sparse Row sparse array of dtype 'int64'
    with 4 stored elements and shape (4, 4)>

>>> csgraph_to_masked(graph)
masked_array(
  data=[[ --, 1.0, 2.0,  --],
        [ --,  --,  --, 1.0],
        [ --,  --,  --, 3.0],
        [ --,  --,  --,  --]],
  mask=[[ True, False, False,  True],
        [ True,  True,  True, False],
        [ True,  True,  True, False],
        [ True,  True,  True,  True]],
  fill_value=1e+20)