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# scipy.io.mmwrite

`scipy.io.``mmwrite`(target, a, comment='', field=None, precision=None)

  Writes the sparse or dense array a to a Matrix Market formatted file.

  Parameters: | target : file Matrix Market filename (extension .mtx) or open file object a : array like Sparse or dense 2D array comment : str, optional comments to be prepended to the Matrix Market file field : None or str, optional Either ‘real’, ‘complex’, ‘pattern’, or ‘integer’. precision : None or int, optional Number of digits to display for real or complex values.