scipy.sparse.coo_array.

tocsr

coo_array.tocsr(copy=False)

将此数组/矩阵转换为压缩稀疏行格式

重复的条目将会被加总在一起。

示例

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>>> from numpy import array
>>> from scipy.sparse import coo_array
>>> row  = array([0, 0, 1, 3, 1, 0, 0])
>>> col  = array([0, 2, 1, 3, 1, 0, 0])
>>> data = array([1, 1, 1, 1, 1, 1, 1])
>>> A = coo_array((data, (row, col)), shape=(4, 4)).tocsr()
>>> A.toarray()
array([[3, 0, 1, 0],
       [0, 2, 0, 0],
       [0, 0, 0, 0],
       [0, 0, 0, 1]])

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