scipy.io.mminfo#
- scipy.io.mminfo(source)[source]#
Return size and storage parameters from Matrix Market file-like ‘source’.
- Parameters:
- sourcestr or file-like
Matrix Market filename (extension .mtx) or open file-like object
- Returns:
- rowsint
Number of matrix rows.
- colsint
Number of matrix columns.
- entriesint
Number of non-zero entries of a sparse matrix or rows*cols for a dense matrix.
- formatstr
Either ‘coordinate’ or ‘array’.
- fieldstr
Either ‘real’, ‘complex’, ‘pattern’, or ‘integer’.
- symmetrystr
Either ‘general’, ‘symmetric’, ‘skew-symmetric’, or ‘hermitian’.
Notes
Changed in version 1.12.0: C++ implementation.
Examples
>>> from io import StringIO >>> from scipy.io import mminfo
>>> text = '''%%MatrixMarket matrix coordinate real general ... 5 5 7 ... 2 3 1.0 ... 3 4 2.0 ... 3 5 3.0 ... 4 1 4.0 ... 4 2 5.0 ... 4 3 6.0 ... 4 4 7.0 ... '''
mminfo(source)
returns the number of rows, number of columns, format, field type and symmetry attribute of the source file.>>> mminfo(StringIO(text)) (5, 5, 7, 'coordinate', 'real', 'general')