scipy.sparse.csgraph.

csgraph_from_masked#

scipy.sparse.csgraph.csgraph_from_masked(graph)#

從遮罩陣列建構 CSR 格式的圖形。

在 0.11.0 版本中新增。

參數:

graphMaskedArray: 輸入圖形。形狀應為 (n_nodes, n_nodes)。

回傳值:

csgraphcsr_array: 圖形的壓縮稀疏表示法，

範例

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