◆ mm_read_info()

def mm_read_info ( fname )

Read matrix information from Matrix Market file

Purpose: This function reads format and size of matrix from the Matrix Market file.

Returns: (info, nrow, ncol, nnz, dtype, mshape, mform)

info (int):
= 0: Successful exit.
= i < 0: The (-i)-th argument is invalid.
= 1: Failed to open file.
= 3: File read error.
= 4: Invalid type.

nrow (int):
Number of rows of the matrix.

ncol (int):
Number of columns of the matrix.

nnz (int):
Number of nonzero elements of the matrix.

dtype (int):
Data type of the matrix.
= 0: Real.
= 1: Complex
= 2: Pattern.
= 3: Integer.

mshape (int):
Matrix shape.
= 0: General.
= 1: Symmetric.
= 2: Skew-symmetric.
= 3: Hermitian.

mform (int):
Storage format of the matrix.
= 0: Sparse.
= 1: Dense.

Parameters

[in] Fname Input file name.