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function test207
%TEST207 test iso subref
% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0
rng ('default') ;
% GrB.burble (1) ;
n = 1000 ;
A.matrix = spones (sprand (n, 1, 0.5)) ;
A.iso = true ;
m = 500 ;
I = randperm (n, m) ;
I0 = uint64 (I) - 1 ;
J0 = uint64 (0) ;
Cin = sparse (m, 1) ;
C1 = A.matrix (I, 1) ;
C2 = GB_mex_Matrix_extract (Cin, [ ], [ ], A, I0, J0, [ ]) ;
assert (isequal (C2.matrix, C1)) ;
GrB.burble (0) ;
fprintf ('\ntest207: all tests passed\n') ;
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