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第二节讲义_1682136737988_0
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sparse_mx
- #技术清单
- coo (Coordinate Matrix）
- (row, col, data)
- 不支持切片和算术运算操作
- CSR（Compressed Sparse Row Matrix）
indices,indptr，data
- 优点：高效运算
- 缺点：切片慢
- csr_matrix((data, indices, indptr), [shape=(M, N)])
- sp.csr_matrix(A),A.todense()
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