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
|
function C = GB_spec_resize (A, nrows_new, ncols_new)
%GB_SPEC_RESIZE a mimic of GxB_resize
%
% Usage:
% C = GB_spec_resize (A, nrows_new, ncols_new)
% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0
%-------------------------------------------------------------------------------
% get inputs
%-------------------------------------------------------------------------------
if (nargout > 1 || nargin ~= 3)
error ('usage: C = GB_spec_resize (A, nrows_new, ncols_new)') ;
end
C = GB_spec_matrix (A) ;
c_class = C.class ;
%-------------------------------------------------------------------------------
% do the work via a clean *.m interpretation of the entire GraphBLAS spec
%-------------------------------------------------------------------------------
[nrows_old ncols_old] = size (C.matrix) ;
if (ncols_new < ncols_old)
C.matrix = C.matrix (:, 1:ncols_new) ;
C.pattern = C.pattern (:, 1:ncols_new) ;
elseif (ncols_new > ncols_old)
z = GB_spec_zeros ([nrows_old, ncols_new - ncols_old], c_class) ;
C.matrix = [C.matrix z ] ;
C.pattern = [C.pattern (false (nrows_old, ncols_new - ncols_old))] ;
end
if (nrows_new < nrows_old)
C.matrix = C.matrix (1:nrows_new, :) ;
C.pattern = C.pattern (1:nrows_new, :) ;
elseif (nrows_new > nrows_old)
z = GB_spec_zeros ([nrows_new - nrows_old, ncols_new], c_class) ;
C.matrix = [C.matrix ; z ] ;
C.pattern = [C.pattern ; (false (nrows_new - nrows_old, ncols_new))] ;
end
|
