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−% function test_ao_spectrogram()
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−% TEST_AO_SPECTROGRAM test spectrogram function for analysis objects.
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−%
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−%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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−%
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−% DESCRIPTION: TEST_AO_SPECTROGRAM test spectrogram function for analysis
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−%              objects.
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−%
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−% CALL:    test_ao_spectrogram;
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−%
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−% HISTORY: 26-12-2007 Hewitson
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−%             Creation.
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−%
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−% VERSION: % $Id: test_ao_spectrogram.m,v 1.1 2008/01/30 21:36:26 hewitson Exp $
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−%
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−%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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−
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−clear all
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−
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−
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−%% Make time-series object
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−nsecs = 100;
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−fs    = 100;
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−p     = plist('waveform', 'noise', 'fs', fs, 'nsecs', nsecs);
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−n     = ao(p);
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−p     = plist('waveform', 'chirp', 'fs', fs, 'nsecs', nsecs, 'f0', 0, 'f1', 50, 't1', nsecs);
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−s     = ao(p);
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−
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−a = s+n;
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−
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−%% Make spectrogram
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−
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−sxx = spectrogram(a, plist('Nfft', 4*fs));
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−
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−
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−figure
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−imagesc(sxx.data.x, sxx.data.y, sxx.data.z)