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annotate m-toolbox/test/test_ao_pwelch.m @ 35:4be5f7a5316f database-connection-manager

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author Daniele Nicolodi <nicolodi@science.unitn.it>
date Mon, 05 Dec 2011 16:20:06 +0100
parents f0afece42f48
children
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Daniele Nicolodi <nicolodi@science.unitn.it>
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1 % Test ao/pwelch functionality.
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Daniele Nicolodi <nicolodi@science.unitn.it>
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2 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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3 % M Hewitson 08-05-08
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4 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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5 % $Id: test_ao_pwelch.m,v 1.7 2009/02/02 15:20:38 hewitson Exp $
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6 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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7 function test_ao_pwelch()
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8
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9 nsecs = 10;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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10 fs = 1000;
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11
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Daniele Nicolodi <nicolodi@science.unitn.it>
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12 pl = plist(...
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13 'nsecs', nsecs, ...
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14 'fs', fs, 'tsfcn', ...
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15 '(t.^2 - (t.^3)/10) + sin(2*pi*7*t) + randn(size(t))');
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16
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17 a1 = ao(pl);
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18 a2 = ao(pl);
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19
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Daniele Nicolodi <nicolodi@science.unitn.it>
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20 % Make PSDs
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21 Nfft = 2*fs;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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22 win = specwin('Hanning', Nfft);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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23 pl = plist('Nfft', '2*fs', 'win', win, 'order', 2, 'Scale', 'ASD');
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24 a3 = psd(a1,pl);
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25
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26 [pxx,f] = pwelch(a1.data.y, win.win, Nfft/2, Nfft, a1.data.fs);
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27 a4 = ao(fsdata(f.', pxx.'));
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28
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29 % Plot
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30 iplot(a3, a4, plist('LineStyles', {'', '--'}))
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31 iplot(a3./a4)
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32
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33 end
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34 % END