dia_matrix: DIAgonal format 8. spmatrix: Sparse matrix base clas ''' 矩阵属性 from scipy.sparse import csr_matrix ### 共有属性 mat.shape # 矩阵形状 mat.dtype # 数据类型 mat.ndim # 矩阵维度 mat.nnz # 非零个数 mat.data # 非零值, 一维数组 ### COO 特有的 coo.row # 矩阵行索引 ...
There are seven available sparse matrix types:1. csc_matrix: Compressed Sparse Column format2. csr_matrix: Compressed Sparse Row format3.bsr_matrix:BlockSparse Row format4. lil_matrix: List of Lists format5. dok_matrix:Dictionaryof Keys format6. coo_matrix: COOrdinate format (aka IJV, triplet...
Sparse matrices can be used in arithmetic operations: they support addition, subtraction, multiplication, division, and matrix power Advantages of the CSR format efficient arithmetic operations CSR + CSR, CSR * CSR, etc. efficient row slicing fast matrix vector products Disadvantages of the CSR forma...
csr_matrix((data, indices, indptr), [shape=(M, N)]) is the standard CSR representation where the column indices for row i are stored in indices[indptr[i]:indptr[i+1]] and their corresponding values are stored in data[indptr[i]:indptr[i+1]]. If the shape parameter is not supplied,...
the CSC format is identical to the CSR format for the transposed matrix. The CSR format is specified by four arrays:values,columns,pointerB, andpointerE. The following table describes the arrays in terms of the values, row, and column positions of the non-zero elements in a sparse matrixA...
Contrary to CUSPARSE which works with common CSR format, our new format requires conversion. However, multiplication of sparse-matrix and vector is significantly faster for many atrices. We demonstrate it on set of 1 600 matrices and we show for what types of matrices our format is profitable....
csc_matrix: Compressed Sparse Column format csr_matrix: Compressed Sparse Row format bsr_matrix: Block Sparse Row format lil_matrix: List of Lists format dok_matrix: Dictionary of Keys format coo_matrix: COOrdinate format (aka IJV, triplet format) dia_matrix: DIAgonal format...
csc_matrix(arg1[, shape, dtype, copy]) Compressed Sparse Column matrix csc_matrix的初始化方法可以是bsr_matrix的初始化方法,也可以是coo_matrix的初始化方法,该csc_matrix与下面的csr_matrix是比较常用的稀疏矩阵。 2.4 csr_matrix csr_matrix(arg1[, shape, dtype, copy]) ...
format. csc_matrix(arg1[, shape, dtype, copy]) Compressed Sparse Column matrix csr_matrix(arg1[...
I need to multiply a symmetric sparse matrix by a vector and I would like to use the subroutine mkl_dcsrsymv . The upper triangle of the sparse matrix is stored in a CSR format (row major, 3 arrays). However, the elements in the array columns (ja) a...