`scipy.sparse.csgraph._tools:csgraph_from_masked`

Signature

def csgraph_from_masked(graph)

Summary

Construct a CSR-format graph from a masked array.

Extended Summary

Parameters

graph : MaskedArray: Input graph. Shape should be (n_nodes, n_nodes).

Returns

csgraph : csr_array: Compressed sparse representation of graph,

Examples

import numpy as np
from scipy.sparse.csgraph import csgraph_from_masked

✓

graph_masked = np.ma.masked_array(data =[
[0, 1, 2, 0],
[0, 0, 0, 1],
[0, 0, 0, 3],
[0, 0, 0, 0]
],
mask=[[ True, False, False,  True],
      [ True,  True,  True, False],
      [ True,  True,  True, False],
      [ True,  True,  True,  True]],
fill_value = 0)

✓

csgraph_from_masked(graph_masked)

✗

<Compressed Sparse Row sparse array of dtype 'float64'
	with 4 stored elements and shape (4, 4)>

Aliases

scipy.sparse.csgraph.csgraph_from_masked