Queries the contents of the Matrix Market file ‘filename’ to extract size and storage information.


source - Matrix Market filename (extension .mtx) or open file object


rows,cols - number of matrix rows and columns entries - number of non-zero entries of a sparse matrix

or rows*cols for a dense matrix

format - ‘coordinate’ | ‘array’ field - ‘real’ | ‘complex’ | ‘pattern’ | ‘integer’ symm - ‘general’ | ‘symmetric’ | ‘skew-symmetric’ | ‘hermitian’

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