scipy.sparse.csgraph.csgraph_from_masked

scipy.sparse.csgraph.csgraph_from_masked(graph)

从掩码数组构造CSR格式的图形。

0.11.0 新版功能.

参数
graphMaskedArray

输入图形。形状应为(n_Nodes,n_Nodes)。

退货
csgraphcsr_matrix

图的压缩稀疏表示,

示例

>>> 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)
<4x4 sparse matrix of type '<class 'numpy.float64'>'
    with 4 stored elements in Compressed Sparse Row format>