1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
function C = and (A, B)
%& logical AND.
% C = (A & B) is the element-by-element logical AND of A and B. One or
% both may be scalars. Otherwise, A and B must have the same size.
%
% See also GrB/or, GrB/xor, GrB/not.
% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0
if (isobject (A))
A = A.opaque ;
end
if (isobject (B))
B = B.opaque ;
end
[am, an] = gbsize (A) ;
[bm, bn] = gbsize (B) ;
a_is_scalar = (am == 1) && (an == 1) ;
b_is_scalar = (bm == 1) && (bn == 1) ;
if (a_is_scalar)
if (b_is_scalar)
% A and B are scalars
C = GrB (gbemult (A, '&.logical', B)) ;
else
% A is a scalar, B is a matrix
if (gb_scalar (A) == 0)
% A is false, so C is empty, the same size as B
C = GrB (gbnew (bm, bn, 'logical')) ;
else
% A is true, so C is B typecasted to logical
C = GrB (gbnew (B, 'logical')) ;
end
end
else
if (b_is_scalar)
% A is a matrix, B is a scalar
if (gb_scalar (B) == 0)
% B is false, so C is empty, the same size as A
C = GrB (gbnew (am, an, 'logical')) ;
else
% B is true, so C is A typecasted to logical
C = GrB (gbnew (A, 'logical')) ;
end
else
% both A and B are matrices. C is the set intersection of A and B
C = GrB (gbemult (A, '&.logical', B)) ;
end
end
|
