1function Mask = GB_random_mask (m, n, d, M_is_csc, M_is_hyper) 2% Mask = GB_random_mask (m, n, d, M_is_csc, M_is_hyper) 3% 4% Construct a random matrix, either as a matrix or a struct 5% With 3 arguments, Mask is a sparse logical matrix. 6% With 4, Mask is a struct. 7 8% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2021, All Rights Reserved. 9% SPDX-License-Identifier: Apache-2.0 10 11M = (sprand (m, n, d) ~= 0) ; 12 13if (nargin < 4) 14 Mask = M ; 15else 16 Mask.matrix = M ; 17 Mask.is_csc = M_is_csc ; 18 Mask.is_hyper = M_is_hyper ; 19end 20 21