--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/m-toolbox/test/test_ao_cpsd.m	Wed Nov 23 19:22:13 2011 +0100
@@ -0,0 +1,54 @@
+% Test ao/cpsd functionality.
+%
+% M Hewitson 08-05-08
+%
+% $Id: test_ao_cpsd.m,v 1.6 2009/03/26 09:04:05 miquel Exp $
+%
+ function test_ao_cpsd()
+  
+  % Make test AOs
+  
+  nsecs = 10;
+  fs    = 1000;
+  
+  pl = plist();
+  pl.append('nsecs', nsecs);
+  pl.append('fs', fs);
+  pl.append('tsfcn', 'sin(2*pi*7.433*t) + randn(size(t))');
+  
+  a1 = ao(pl);
+  a2 = ao(pl);
+  
+  % Filter one time-series
+  
+  % Make a filter
+  pl = plist('type', 'bandpass', 'fs', 1000, 'order', 3, 'fc', [50 250]);
+  f2 = miir(pl);
+  
+  % filter the input data
+  [a3, f2] = filter(a1,plist('filter', f2));
+  
+  % make some cross-power
+  a4 = 10.*a3+a2;
+  
+  % Make CPSD from a6 to a7
+  Nfft = 1000;
+  win  = specwin('Hanning', Nfft);
+  pl = plist('Nfft', Nfft, 'Win', win, 'order', 2);
+  a8 = cpsd(a1, a4, pl);
+  
+  % Use matlab
+  [pxy, f] = cpsd(a1.data.y, a4.data.y, win.win, Nfft/2, Nfft, a1.data.fs);
+  a9 = ao(fsdata(f.', pxy.'));
+  
+  % Plot
+  iplot(a8, a9, plist('LineStyles', {'', '--'}))
+  iplot(a8 ./ a9)
+  
+  % Test cpsd(a1,a1) = psd(a1)
+  a10 = cpsd(a1, a1, pl);
+  a11 = psd(a1, pl);
+  
+  iplot(a10,a11)
+  
+ end