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function test38
%TEST38 test GrB_transpose
% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0
fprintf ('\n ----------- testing GB_mex_transpose on SuiteSparse matrices\n') ;
% test GB_mex_transpose on lots of matrices from the
% SuiteSparse matrix collection
index = ssget ;
[~, f] = sort (index.nnz) ;
nmat = length (f) ;
for k = 1:500
fprintf ('.') ;
id = f (k) ;
Prob = ssget (id) ;
A = Prob.A ;
if (~isreal (A))
A = real (A) ;
end
[m n] = size (A) ;
% tic
C = A' ;
% toc
% tic
S = GB_mex_transpose (sparse (n,m), [ ], [ ], A) ;
% toc
assert (isequal (C,S.matrix)) ;
end
fprintf ('\ntest38: all tests passed\n') ;
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