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function A = GB_spec_random (m, n, d, scale, type, is_csc,is_hyper,hyper_switch)
%GB_SPEC_RANDOM generate random matrix
%
% A = GB_spec_random (m, n, d, scale, type, is_csc, is_hyper, hyper_switch)
%
% m,n,d: parameters to sprandn (m,n,d)
% m,n: defaults to 4
% d: defaults to 0.5. If d = inf, A is fully populated.
% scale: a double scalar, defaults to 1.0
% type: a string; defaults to 'double'
% is_csc: true for CSC, false for CSR; defaults to true
% is_hyper: false for non-hypersparse, true for hypersparse, default false
% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0
if (nargin < 1)
m = 4 ;
end
if (nargin < 2)
n = 4 ;
end
if (nargin < 3)
d = 0.5 ;
end
if (nargin < 4)
scale = 1 ;
end
if (nargin < 5)
type = 'double' ;
end
if (nargin >= 6)
A.is_csc = is_csc ;
else
is_csc = true ;
end
if (nargin >= 7 && ~isempty (is_hyper))
A.is_hyper = is_hyper ;
end
if (nargin >= 8)
A.hyper_switch = hyper_switch ;
end
if (isinf (d))
A.matrix = scale * sparse (rand (m, n)) ;
else
A1 = sprandn (m, n, d) ;
A.matrix = scale * A1 ;
[i,j,x] = find (A1, 1, 'first') ;
if (~isempty (x))
A = GB_spec_random_32 (A, x) ;
end
end
if (test_contains (type, 'complex'))
if (isinf (d))
A.matrix = A.matrix + 1i * scale * sparse (rand (m, n)) ;
else
A.matrix = A.matrix + 1i * scale * sprandn (m, n, d) ;
end
end
if (type (1) == 'u')
% A is uint8, uint16, uint32, or uint64
A.matrix = abs (A.matrix) ;
end
A.class = type ;
A.pattern = logical (spones (A.matrix)) ;
A.iso = false ;
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