/usr/share/octave/packages/optiminterp-0.3.4/test_optiminterp.m is in octave-optiminterp 0.3.4-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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%%
%% This program is free software; you can redistribute it and/or modify it under
%% the terms of the GNU General Public License as published by the Free Software
%% Foundation; either version 3 of the License, or (at your option) any later
%% version.
%%
%% This program is distributed in the hope that it will be useful, but WITHOUT
%% ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
%% FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
%% details.
%%
%% You should have received a copy of the GNU General Public License along with
%% this program; if not, see <http://www.gnu.org/licenses/>.
% Tests 1D, 2D, 3D and 4D optimal interpolation.
% All tests should pass; any error indicates that either
% there is a bug in the optimal interpolation package or
% that it is incrorrectly installed.
function test_optiminterp
more off
printf('Testing 1D-optimal interpolation: ');
try
% grid of background field
xi = linspace(0,1,50);
fi_ref = sin( xi*6 );
% grid of observations
x = linspace(0,1,20);
on = numel(x);
var = 0.01 * ones(on,1);
f = sin( x*6 );
m = 15;
[fi,vari] = optiminterp1(x,f,var,0.1,m,xi);
rms = sqrt(mean((fi_ref(:) - fi(:)).^2));
if (rms > 0.005)
error('unexpected large difference with reference field');
end
disp('OK');
catch
disp('failed');
disp(lasterr);
end
printf('Testing 2D-optimal interpolation: ');
try
% grid of background field
[xi,yi] = ndgrid(linspace(0,1,30));
fi_ref = sin( xi*6 ) .* cos( yi*6);
% grid of observations
[x,y] = ndgrid(linspace(0,1,20));
x = x(:);
y = y(:);
on = numel(x);
var = 0.01 * ones(on,1);
f = sin( x*6 ) .* cos( y*6);
m = 30;
[fi,vari] = optiminterp2(x,y,f,var,0.1,0.1,m,xi,yi);
rms = sqrt(mean((fi_ref(:) - fi(:)).^2));
if (rms > 0.005)
error('unexpected large difference with reference field');
end
disp('OK');
catch
disp('failed');
disp(lasterr);
end
printf('Testing 3D-optimal interpolation: ');
try
% grid of background field
[xi,yi,zi] = ndgrid(linspace(0,1,15));
fi_ref = sin(6*xi) .* cos(6*yi) .* sin(6*zi);
% grid of observations
[x,y,z] = ndgrid(linspace(0,1,10));
x = x(:);
y = y(:);
z = z(:);
on = numel(x);
var = 0.01 * ones(on,1);
f = sin(6*x) .* cos(6*y) .* sin(6*z);
m = 20;
[fi,vari] = optiminterp3(x,y,z,f,var,0.1,0.1,0.1,m,xi,yi,zi);
rms = sqrt(mean((fi_ref(:) - fi(:)).^2));
if (rms > 0.04)
error('unexpected large difference with reference field');
end
disp('OK');
catch
disp('failed');
disp(lasterr);
end
printf('Testing 4D-optimal interpolation: ');
try
% grid of background field
[xi,yi,zi,ti] = ndgrid(linspace(0,1,5));
fi_ref = sin(6*xi) .* cos(6*yi) .* sin(6*zi) .* cos(6*ti);
% grid of observations
[x,y,z,t] = ndgrid(linspace(0,1,10));
x = x(:);
y = y(:);
z = z(:);
t = t(:);
on = numel(x);
var = 0.01 * ones(on,1);
f = sin(6*x) .* cos(6*y) .* sin(6*z) .* cos(6*t);
m = 20;
[fi,vari] = optiminterp4(x,y,z,t,f,var,0.1,0.1,0.1,0.1,m,xi,yi,zi,ti);
rms = sqrt(mean((fi_ref(:) - fi(:)).^2));
if (rms > 0.04)
error('unexpected large difference with reference field');
end
disp('OK');
catch
disp('failed');
disp(lasterr);
end
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