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function test1
%TEST1 test cs_transpose
%
% Example:
% test1
% See also: testall
% CSparse, Copyright (c) 2006-2022, Timothy A. Davis. All Rights Reserved.
% SPDX-License-Identifier: LGPL-2.1+
index = ssget ;
[ignore f] = sort (max (index.nrows, index.ncols)) ;
f = f (1:100) ;
for ii = f
Prob = ssget (ii) ;
disp (Prob) ;
A = Prob.A ;
if (~isreal (A))
continue
end
B = A' ;
C = cs_transpose (A) ;
if (nnz (B-C) ~= 0)
error ('!')
end
[m n] = size (A) ;
% if (m == n)
x = rand (n,1) ;
y = rand (m,1) ;
z = y+A*x ;
q = cs_gaxpy (A,x,y) ;
err = norm (z-q,1) / norm (z,1) ;
disp (err) ;
if (err > 1e-14)
error ('!')
end
% end
[i j x] = find (A) ;
p = randperm (length (i)) ;
i = i (p) ;
j = j (p) ;
x = x (p) ;
if (m == 1)
% find returns rows vectors if A is 1-by-n,
% but cs_sparse requires column vectors
i = i (:) ;
j = j (:) ;
x = x (:) ;
end
D = sparse (i,j,x) ;
E = cs_sparse (i,j,x) ;
% [i j x]
F = cs_sparse2 (i,j,x) ;
if (nnz (D-E) ~= 0)
error ('!')
end
if (nnz (F-E) ~= 0)
error ('!')
end
clear A B C D E F
% pause
end
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