function [A, Z] = mread (filename,prefer_binary)                      %#ok
%MREAD read a sparse matrix from a file in Matrix Market format
%
% Example:
%   A = mread (filename)
%   [A Z] = mread (filename, prefer_binary)
%
% Unlike MMREAD, only the matrix is returned; the file format is not
% returned.  Explicit zero entries can be present in the file; these are
% not included in A.  They appear as the nonzero pattern of the binary
% matrix Z.
%
% If prefer_binary is not present, or zero, a symmetric pattern-only
% matrix is returned with A(i,i) = 1+length(find(A(:,i))) if it is
% present in the pattern, and A(i,j) = -1 for off-diagonal entries.  If
% you want the original Matrix Market matrix in this case, simply use
% A=mread(filename,1).
%
% Compare with mmread.m at http://math.nist.gov/MatrixMarket
%
% See also load.

 % Copyright 2006-2023, Timothy A. Davis, All Rights Reserved.
 % SPDX-License-Identifier: GPL-2.0+

error ('mread mexFunction not found') ;