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function test237
%TEST237 test GrB_mxm (saxpy4)
% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0
GrB.burble (0) ;
rng ('default') ;
n = 32 ;
for k = [1 2 4 8 32]
A = GB_spec_random (n, n, 0.3) ;
B = GB_spec_random (n, k, 0.3) ;
B.sparsity = 4 ; % bitmap
F = GB_spec_random (n, k, inf) ;
F.sparsity = 8 ; % full
accum.opname = 'plus' ;
accum.optype = 'double' ;
% fprintf ('\n----------------- accum:\n') ;
% GB_mex_binaryop (accum) ;
% fprintf ('\n----------------- semiring:\n') ;
semiring.multiply = 'times' ;
semiring.add = 'plus' ;
semiring.class = 'double' ;
% GB_mex_semiring (semiring, 3) ;
tol = 1e-12 ;
% fprintf ('\n----------------- F += S*B:\n\n') ;
A.sparsity = 2 ;
C1 = GB_mex_mxm (F, [ ], accum, semiring, A, B, [ ]) ;
C2 = GB_spec_mxm (F, [ ], accum, semiring, A, B, [ ]) ;
GB_spec_compare (C1, C2, tol) ;
% fprintf ('\n----------------- F += H*B:\n\n') ;
A.sparsity = 1 ;
C1 = GB_mex_mxm (F, [ ], accum, semiring, A, B, [ ]) ;
C2 = GB_spec_mxm (F, [ ], accum, semiring, A, B, [ ]) ;
GB_spec_compare (C1, C2, tol) ;
B = GB_spec_random (n, k, inf) ;
B.sparsity = 8 ; % full
% fprintf ('\n----------------- F += S*F:\n\n') ;
A.sparsity = 2 ;
C1 = GB_mex_mxm (F, [ ], accum, semiring, A, B, [ ]) ;
C2 = GB_spec_mxm (F, [ ], accum, semiring, A, B, [ ]) ;
GB_spec_compare (C1, C2, tol) ;
% fprintf ('\n----------------- F += H*F:\n\n') ;
A.sparsity = 1 ;
C1 = GB_mex_mxm (F, [ ], accum, semiring, A, B, [ ]) ;
C2 = GB_spec_mxm (F, [ ], accum, semiring, A, B, [ ]) ;
GB_spec_compare (C1, C2, tol) ;
end
% k = 1 with a sparser A matrix
A = GB_spec_random (n, n, 0.05) ;
B = GB_spec_random (n, 1, 0.3) ;
B.sparsity = 4 ; % bitmap
F = GB_spec_random (n, 1, inf) ;
F.sparsity = 8 ; % full
% fprintf ('\n----------------- F += S*F:\n\n') ;
A.sparsity = 2 ;
C1 = GB_mex_mxm (F, [ ], accum, semiring, A, B, [ ]) ;
C2 = GB_spec_mxm (F, [ ], accum, semiring, A, B, [ ]) ;
GB_spec_compare (C1, C2, tol) ;
GrB.burble (0) ;
fprintf ('test237: all tests passed\n') ;
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