1function test136
2%TEST136 GxB_subassign, method 08, 09, 11
3
4% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2021, All Rights Reserved.
5% SPDX-License-Identifier: Apache-2.0
6
7fprintf ('test136: GxB_subassign, special cases\n') ;
8
9rng ('default') ;
10
11m = 1000 ;
12n = 5 ;
13am = 500 ;
14an = n ;
15
16C = sprand (m, n, 0.1) ;
17I = randperm (m, am) ;
18
19M = spones (sprand (am, an, 0.1)) ;
20A = sprand (am, an, 0.1) ;
21I0 = uint64 (I) - 1 ;
22
23M (:,1) = 0 ;
24M (1:2,1) = 1 ;
25A (:,1) = sprand (am, 1, 0.8)  ;
26
27A (:,2) = 0 ;
28A (1:2,2) = 1 ;
29M (:,2) = spones (sprand (am, 1, 0.8))  ;
30
31% Method 08: C(I,J)<M> += A
32C2 = GB_mex_subassign  (C, M, 'plus', A, I0, [ ], [ ]) ;
33C1 = GB_spec_subassign (C, M, 'plus', A, I , [ ], [ ], false) ;
34GB_spec_compare (C1, C2) ;
35
36% create a Mask with explicit zero entries
37[i j x] = find (M) ;
38nz = length (x) ;
39p = randperm (nz, floor(nz/2)) ;
40x (p) = 0 ;
41i = uint64 (i-1) ;
42j = uint64 (j-1) ;
43Mask = GB_mex_Matrix_build (i,j,x,am,an,[]) ;
44Mask = Mask.matrix ;
45
46% Method 09: C(I,J)<M,repl> = scalar
47scalar = sparse (pi) ;
48desc.outp = 'replace' ;
49C2 = GB_mex_subassign  (C, Mask, [ ], scalar, I0, [ ], desc) ;
50C1 = GB_spec_subassign (C, Mask, [ ], scalar, I , [ ], desc, true) ;
51GB_spec_compare (C1, C2) ;
52
53% Method 11: C(I,J)<M,repl> += scalar
54scalar = sparse (pi) ;
55desc.outp = 'replace' ;
56C2 = GB_mex_subassign  (C, Mask, 'plus', scalar, I0, [ ], desc) ;
57C1 = GB_spec_subassign (C, Mask, 'plus', scalar, I , [ ], desc, true) ;
58GB_spec_compare (C1, C2) ;
59
60% repeat method 02, subassignment with zombies:
61% subref triggers case 4 with zombies
62% no pending tuples
63clear desc
64d = [ ] ;
65m = 3 ;
66n = 8 ;
67C = sparse (rand (m,n)) ;
68C = tril (C,-1) + triu (C,1) ;
69
70Work (1).A = sparse (m,2) ;
71Work (1).I = [ ] ;
72Work (1).J = [1 2] ;
73Work (1).desc = d ;
74Work (2).A = sparse (m,2) ;
75Work (2).I = [ ] ;
76Work (2).J = [2 3] ;
77Work (2).desc = d ;
78Work (3).A = sparse (m,2) ;
79Work (3).I = [ ] ;
80Work (3).J = [4 8] ;
81Work (3).desc = d ;
82
83Work2 (1).A = sparse (m,2) ;
84Work2 (1).I = [ ] ;
85Work2 (1).J = uint64 ([1 2]) - 1 ;
86Work2 (1).desc = d ;
87Work2 (2).A = sparse (m,2) ;
88Work2 (2).I = [ ] ;
89Work2 (2).J = uint64 ([2 3])  - 1;
90Work2 (2).desc = d ;
91Work2 (3).A = sparse (m,2) ;
92Work2 (3).I = [ ] ;
93Work2 (3).J = uint64 ([4 8]) - 1 ;
94Work2 (3).desc = d ;
95
96C1 = C ;
97for k = 1:length (Work)
98    C1 = GB_spec_subassign (C1, [ ], [ ], ...
99        Work (k).A, Work (k).I, Work (k).J, Work (k).desc, false) ;
100end
101
102C2 = GB_mex_subassign (C, Work2) ;
103GB_spec_compare (C1, C2) ;
104
105C2 = GB_mex_subassign (C, Work2, [2 2]) ;
106GB_spec_compare (C1, C2) ;
107
108fprintf ('test136: all tests passed\n') ;
109