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
|
function C = gb_sum (op, G, option)
%GB_SUM C = sum (G) or C = any (G)
% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0
if (nargin == 2)
% C = sum (G)
if (gb_isvector (G))
option = 'all' ;
else
option = 1 ;
end
end
switch (option)
case { 'all' }
% C = sum (G, 'all'), reducing all entries to a scalar
C = gbreduce (op, G) ;
case { 1 }
% C = sum (G, 1) reduces each column to a scalar,
% giving a 1-by-n row vector.
desc.in0 = 'transpose' ;
C = gbtrans (gbvreduce (op, G, desc)) ;
case { 2 }
% C = sum (G, 2) reduces each row to a scalar,
% giving an m-by-1 column vector.
C = gbvreduce (op, G) ;
otherwise
error ('GrB:error', 'unknown option') ;
end
|
