--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/m-toolbox/test/test_ao_spectrogram.m	Wed Nov 23 19:22:13 2011 +0100
@@ -0,0 +1,37 @@
+% function test_ao_spectrogram()
+% TEST_AO_SPECTROGRAM test spectrogram function for analysis objects.
+%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% DESCRIPTION: TEST_AO_SPECTROGRAM test spectrogram function for analysis
+%              objects.
+%
+% CALL:    test_ao_spectrogram;
+%
+% HISTORY: 26-12-2007 Hewitson
+%             Creation.
+%
+% VERSION: % $Id: test_ao_spectrogram.m,v 1.1 2008/01/30 21:36:26 hewitson Exp $
+%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+clear all
+
+
+%% Make time-series object
+nsecs = 100;
+fs    = 100;
+p     = plist('waveform', 'noise', 'fs', fs, 'nsecs', nsecs);
+n     = ao(p);
+p     = plist('waveform', 'chirp', 'fs', fs, 'nsecs', nsecs, 'f0', 0, 'f1', 50, 't1', nsecs);
+s     = ao(p);
+
+a = s+n;
+
+%% Make spectrogram
+
+sxx = spectrogram(a, plist('Nfft', 4*fs));
+
+
+figure
+imagesc(sxx.data.x, sxx.data.y, sxx.data.z)
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