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function test4
%TEST4 test cs_multiply
%
% Example:
% test4
% See also: testall
% CXSparse, Copyright (c) 2006-2022, Timothy A. Davis. All Rights Reserved.
% SPDX-License-Identifier: LGPL-2.1+
rand ('state', 0) ;
for trial = 1:100
m = fix (10 * rand (1)) ;
n = fix (10 * rand (1)) ;
k = fix (10 * rand (1)) ;
d = rand (1) ;
A = sprandn (m,n,d) ;
B = sprandn (n,k,d) ;
if (~ispc)
if (mod (trial, 4) == 0)
A = A + 1i * sprandn (A) ;
end
if (mod (trial, 2) == 0)
B = B + 1i * sprandn (B) ;
end
end
C = A*B ;
D = cs_multiply (A,B) ;
err = nnz (spones (C) - spones (D)) ;
if (err > 0)
error ('nz!') ;
end
err = norm (C-D,1) ;
fprintf ('m %3d n %3d k %3d nnz(A) %6d nnz(B) %6d nnz(C) %6d err %g\n', ...
m, n, k, nnz(A), nnz(B), nnz(C), err) ;
if (err > 1e-12)
error ('!') ;
end
end
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