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function test45(use_ssget)
%TEST45 test GrB_*_setElement and GrB_*_*build
% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0
fprintf ('\ntest45\n------------------ testing GrB_setElement and _build\n') ;
if (nargin < 1)
use_ssget = true ;
end
rng ('default') ;
A = sparse (rand (3,2)) ;
C = GB_mex_setElement (A, uint64(0), uint64(0), 42.1) ;
A = rand (3,2) ;
A (2,2) = 0 ;
A = sparse (A) ;
C = GB_mex_setElement (A, uint64(1), uint64(1), 99) ;
GB_spok (C.matrix) ;
if (use_ssget)
Prob = ssget ('HB/west0067') ;
A = Prob.A ;
else
A = sprand (67, 67, 0.1) ;
end
[m n] = size (A) ;
ntuples = 1000 ;
A1 = A ;
I = 1 + floor (m * rand (ntuples, 1)) ;
J = 1 + floor (n * rand (ntuples, 1)) ;
X = 100 * rand (ntuples, 1) ;
I0 = uint64 (I)-1 ;
J0 = uint64 (J)-1 ;
for k = 1:ntuples
A1 (I (k), J (k)) = X (k) ;
end
A2 = A ;
A3 = GB_mex_setElement (A2, I0, J0, X) ;
assert (GB_spok (A3.matrix) == 1)
assert (isequal (A3.matrix, A1)) ;
% nnz (A)
% ntuples
% nnz (A1)
% nnz (A3.matrix)
% nnz (A) + ntuples
if (use_ssget)
Prob = ssget (2662)
A = Prob.A ;
else
n = 2999349 ;
nz = 14.3e6 ;
density = nz / (n^2) ;
A = sprandn (n, n, density) ;
end
[m n] = size (A) ;
fprintf ('nnz(A) = %g\n', nnz (A)) ;
for trial = 1:3
if (trial == 1)
fprintf ('\n---------------------- with I,J,X in sorted order\n') ;
elseif (trial == 2)
fprintf ('\n---------------------- with I,J,X in randomized order\n') ;
elseif (trial == 3)
fprintf ('\n---------------------- with I,J,X in randomized order') ;
fprintf (' and duplicates\n') ;
end
ntuples = 100 ;
A1 = A ;
I = 1 + floor (m * rand (ntuples, 1)) ;
J = 1 + floor (n * rand (ntuples, 1)) ;
X = 100 * rand (ntuples, 1) ;
I0 = uint64 (I)-1 ;
J0 = uint64 (J)-1 ;
fprintf ('starting built-in method... please wait\n') ;
tic
for k = 1:ntuples
A1 (I (k), J (k)) = X (k) ;
end
t = toc ;
fprintf ('built-in set element: %g sec\n', t) ;
tic
A2 = GB_mex_setElement (A, I0, J0, X) ;
t2 = toc ;
fprintf ('GraphBLAS setElement: %g seconds speedup %g\n', t2, t/t2) ;
assert (isequal (A1, A2.matrix))
tic
[I,J,X]=find(A) ;
t = toc ;
fprintf ('built-in find: %g sec\n', t) ;
if (trial >= 2)
p = randperm (length (X)) ;
X = X (p) ;
I = I (p) ;
J = J (p) ;
end
tic
G=sparse(I,J,X) ;
t3 = toc ;
fprintf ('built-in sparse: %g sec\n', t3) ;
I0 = uint64 (I)-1 ;
J0 = uint64 (J)-1 ;
S = sparse (m,n) ;
tic
S = GB_mex_setElement (S, I0, J0, X) ;
t5 = toc ;
fprintf ('GraphBLAS setElement: %g sec from scratch, nnz %d\n', ...
t5, nnz (S.matrix)) ;
% fprintf ('GB_spok it 1\n') ;
assert (GB_spok (S.matrix*1) == 1) ;
assert (isequal (G, S.matrix)) ;
if (trial == 3)
X = [X ; X] ;
I = [I ; I] ;
J = [J ; J] ;
I0 = uint64 (I)-1 ;
J0 = uint64 (J)-1 ;
fprintf ('\nnow with lots of duplicates\n') ;
end
tic
G=sparse(I,J,X) ;
t3 = toc ;
fprintf ('built-in sparse: %g sec\n', t3) ;
tic
T = GB_mex_Matrix_build (I0, J0, X, m, n) ;
t4 = toc ;
fprintf ('GraphBLAS build: %g sec from scratch, nnz %d\n', ...
t4, nnz (T.matrix)) ;
% fprintf ('GB_spok it 2\n') ;
assert (GB_spok (T.matrix*1) == 1) ;
assert (isequal (G, T.matrix)) ;
fprintf ('\n------------------- now try a vector B = A(:)\n') ;
B = A (:) ;
blen = size (B,1) ;
fprintf ('vector B has length %d with %d nonzeros\n', blen, nnz (B)) ;
tic
[I,J,X]=find(B) ;
t = toc ;
fprintf ('built-in find: %g sec\n', t) ;
if (trial == 2)
p = randperm (length (X)) ;
X = X (p) ;
I = I (p) ;
J = J (p) ;
end
tic
G=sparse(I,J,X,blen,1) ;
t3 = toc ;
fprintf ('built-in sparse: %g sec\n', t3) ;
I0 = uint64 (I)-1 ;
J0 = uint64 (J)-1 ;
S = sparse (blen,1) ;
tic
S = GB_mex_setElement (S, I0, J0, X) ;
t5 = toc ;
fprintf ('GraphBLAS setElement: %g sec from scratch, nnz %d\n', ...
t5, nnz (S.matrix)) ;
% fprintf ('GB_spok it 3\n') ;
assert (GB_spok (S.matrix*1) == 1) ;
assert (isequal (G, S.matrix)) ;
if (trial == 3)
X = [X ; X] ;
I = [I ; I] ;
J = [J ; J] ;
I0 = uint64 (I)-1 ;
J0 = uint64 (J)-1 ;
fprintf ('\nnow with lots of duplicates\n') ;
end
tic
G=sparse(I,J,X,blen,1) ;
t3 = toc ;
fprintf ('built-in sparse: %g sec\n', t3) ;
tic
T = GB_mex_Matrix_build (I0, J0, X, blen, 1) ;
t4 = toc ;
fprintf ('GraphBLAS mtx: build: %g sec from scratch, nnz %d\n', ...
t4, nnz (T.matrix)) ;
% fprintf ('GB_spok it 4\n') ;
T_matrix = T.matrix * 1 ;
assert (GB_spok (T_matrix) == 1) ;
% assert (isequal (G, T.matrix)) ;
assert (norm (G - T_matrix, 1) / norm (G,1) < 1e-12) ;
tic
T = GB_mex_Vector_build (I0, X, blen) ;
t4 = toc ;
fprintf ('GraphBLAS vec: build: %g sec from scratch, nnz %d\n', ...
t4, nnz (T.matrix)) ;
% fprintf ('GB_spok it 4\n') ;
T_matrix = T.matrix * 1 ;
assert (GB_spok (T_matrix) == 1) ;
assert (norm (G - T_matrix, 1) / norm (G,1) < 1e-12) ;
end
fprintf ('\ntest45: all tests passed\n') ;
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