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%N2 script to test CHOLMOD septree function
% Example:
% n2
% See also cholmod_test
% Copyright 2007, Timothy A. Davis, http://www.suitesparse.com
index = ssget ;
f = find ((index.amd_lnz > 0) & (index.nrows > 200)) ;
[ignore i] = sort (index.amd_lnz (f)) ;
f = f (i) ;
nmat = length (f) ;
for i = f
Prob = ssget (i, index) ;
disp (Prob) ;
A = spones (Prob.A) ;
[m n] = size (A) ;
name = Prob.name ;
clear Prob
if (m == n)
mode = 'sym' ;
A = A + A' ;
len = n ;
elseif (m < n)
mode = 'row' ;
len = m ;
else
mode = 'col' ;
len = n ;
end
[p cp cmem] = nesdis (A, mode) ;
subplot (2,4,1) ;
treeplot (cp) ;
[cp2 cmem2] = septree (cp, cmem, 0.5, 200) ; %#ok
subplot (2,4,2) ;
treeplot (cp2) ;
[cp3 cmem3] = septree (cp, cmem, 0.2, 300) ; %#ok
subplot (2,4,3) ;
treeplot (cp3) ;
[cp4 cmem4] = septree (cp, cmem, 0.12, 500) ; %#ok
subplot (2,4,4) ;
treeplot (cp4) ;
[p cp cmem] = nesdis (A, mode, [200 1]) ;
subplot (2,4,5) ;
treeplot (cp) ;
[cp2 cmem2] = septree (cp, cmem, 0.5, 200) ; %#ok
subplot (2,4,6) ;
treeplot (cp2) ;
[cp3 cmem3] = septree (cp, cmem, 0.2, 300) ; %#ok
subplot (2,4,7) ;
treeplot (cp3) ;
[cp4 cmem4] = septree (cp, cmem, 0.12, 500) ; %#ok
subplot (2,4,8) ;
treeplot (cp4) ;
drawnow
% pause
end
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