bicg1 cg1 coo_csr csr_coo csr_dense csr_dusmm csr_dusmv csr_dussm csr_dussv csr_ssr csr_trans dense_csr ssr_csr ssr_dusmv

csr_ssr() def csr_ssr ( uplo  , n  , val  , rowptr  , colind  , base  , val2  , rowptr2  , colind2  , base2    ) CSR (symmetric full matrix) -> SSR (CSR sparse matrix packed form) Purpose This routine converts the general CSR sparse matrix containing all elements to the symmetric CSR sparse matrix containing only upper or lower triangular elements. In current version, the triangular elements (not including diagonal elements) other than specified by uplo in input matrix will be simply ignored, and it is not tested if it is symmetric matrix. Returns info (int) = 0: Successful exit. = i < 0: The (-i)-th argument is invalid. = j > 0: j elements in input matrix were ignored. Parameters [in] uplo Specifies whether the upper or lower triangular part is stored in the output matrix. = 'U': Upper triangular part. = 'L': Lower triangular part. [in] n Number of rows and columns of matrix. (n >= 0) (if n = 0, returns without computation) [in] val Numpy ndarray (1-dimensional, float, nnz) Values of nonzero elements of input matrix (nnz is the number of nonzero elements of input matrix). [in] rowptr Numpy ndarray (1-dimensional, int32, n + 1) Row pointers of input matrix. [in] colind Numpy ndarray (1-dimensional, int32, nnz) Column indices of input matrix (nnz is the number of nonzero elements of input matrix). [in] base Indexing of rowptr and colind. = 0: Zero-based (C style) indexing: Starting index is 0. = 1: One-based (Fortran style) indexing: Starting index is 1. [out] val2 Numpy ndarray (1-dimensional, float, nnz2) Values of nonzero elements of output matrix (nnz2, the size of arrays val2 and colind2, must be greater than the number of nonzero elements of the upper or lower triangular part of the input matrix). [out] rowptr2 Numpy ndarray (1-dimensional, int32, n + 1) Row pointers of output matrix. [out] colind2 Numpy ndarray (1-dimensional, int32, nnz2) Column indices of output matrix (nnz2, the size of arrays val2 and colind2, must be greater than the number of nonzero elements of the upper or lower triangular part of the input matrix). [in] base2 Indexing of rowptr2 and colind2. = 0: Zero-based (C style) indexing: Starting index is 0. = 1: One-based (Fortran style) indexing: Starting index is 1.