coo_matrix的创建row = np.array([0,3,1,0]) col = np.array([0,3,1,2]) data = np.array([4,5,7,9]) coo_matrix((data, (row, col)), shape=(4,4)).toarray() array([[4,0,9,0], [0,7,0,0], [0,0,0,0], [0,0,0,5]]) coo_matrix((data, (i, j)), [shape=...
coo_matrix(arg1[, shape, dtype, copy]) A sparse matrix in COOrdinate format. csc_matrix(arg1[, shape, dtype, copy]) Compressed Sparse Column matrix csr_matrix(arg1[, shape, dtype, copy]) Compressed Sparse Row matrix dia_matrix(arg1[, shape, dtype, copy]) Sparse matrix with DIAgonal sto...
lil_matrix(arg1[, shape, dtype, copy]) Row-based linked list sparse matrix 与dok_matrix类似,也是可以高效地插入元素更新矩阵。 2.8 spmatrixSparse(基类型) spmatrixSparse([maxprint]) spmatrixSparse是上面所有稀疏矩阵类型的基类型,不能被实例化 3. 矩阵初始化 注意除最后一个基矩阵spmatrixSparse以外,...
The Block Compressed Row (BSR) format is very similar to the Compressed Sparse Row (CSR) format. BSR is appropriate for sparse matrices with dense sub matrices like the last example below. Block matrices often arise in vector-valued finite element discretizations. In such cases, BSR is consider...
•bsr_matrix(arg1[,shape,dtype,copy,blocksize])Block Sparse Row matrix •coo_matrix(arg1[,shape,dtype,copy])Asparse matrix in COOrdinate format.•csc_matrix(arg1[,shape,dtype,copy])Compressed Sparse Column matrix •csr_matrix(arg1[,shape,dtype,copy])Compressed Sparse Row matrix ...
1. COO - coo_matrix Coordinate Matrix 对角存储矩阵 采用三元组(row, col, data)(或称为ijv format)的形式来存储矩阵中非零元素的信息 三个数组 row、col 和data 分别保存非零元素的行下标、列下标与值(一般长度相同) 故coo[row[k]][col[k]] = data[k] ,即矩阵的第 row[k] 行、第 col[k] 列...
coo_matrix(arg1[, shape, dtype, copy]) A sparse matrix in COOrdinate format. csc_matrix(arg1[, shape, dtype, copy]) Compressed Sparse Column matrix csr_matrix(arg1[, shape, dtype, copy]) Compressed Sparse Row matrix dia_matrix(arg1[, shape, dtype, copy]) Sparse matrix with DIAgonal sto...
matrix coo_matrix(arg1[, shape, dtype, copy]) A sparse matrix in COOrdinate format. csc_matrix...
Sparse Matrix Storage Formats稀疏矩阵的存储格式 1. Coordinate Format (COO) 是一种坐标形式的稀疏矩阵。采用三个数组row、col和data保存非零元素的信息,这三个数组的长度相同,row保存元素的行,col保存元素的列,data保存元素的值。存储的主要优点是灵活、简单,仅存储非零元素以及每个非零元素的坐标。但是COO不支持...
coo_matrix(arg1[, shape, dtype, copy]) A sparse matrix in COOrdinate format. csc_matrix(arg1[, shape, dtype, copy]) Compressed Sparse Column matrix This can be instantiated in several ways: csc_matrix(D) with a dense matrix or rank-2 ndarray D csc_matrix(S) with another sparse matrix...