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<p>cfg.toi = -0:0.05:2; % time window "slides" from -0.5 to 1.5 sec in steps of 0.05 sec (50 ms)</p>
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<p>I just noticed this line has an error should be -0.5:0.5:2</p>
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<p>Sorry, I am new to fieldtrip myself and can't be more helpful yet. </p>
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<p>Cheers, </p>
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<p>Elana</p>
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<div id="divRpF993149" style="DIRECTION: ltr"><font color="#000000" size="2" face="Tahoma"><b>From:</b> fieldtrip-bounces@science.ru.nl [fieldtrip-bounces@science.ru.nl] on behalf of Federica Mauro [federica.ma@gmail.com]<br>
<b>Sent:</b> Monday, December 14, 2015 6:30 AM<br>
<b>To:</b> FieldTrip discussion list<br>
<b>Subject:</b> [FieldTrip] Number of epochs in the ft_freqanalysis output<br>
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<div dir="ltr">Dear all,
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<div>I'm having a problem in using the ft_freqanalysis function, so I'm writing to ask your help.</div>
<div>I'm trying to get power data for each 2-seconds epochs of my eeg files.</div>
<div>My eeg files are not of the same length (they don't have the same number of epochs), however the output of the function (namely TFRhann.powspctrm) always gives me power data for the same number of epochs, namely 41, unregarding of the effective number
of epochs.</div>
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<div>Here is the code I'm using:</div>
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<div>cfg = [];</div>
<div>cfg.output = 'pow';</div>
<div>% cfg.channel </div>
<div>cfg.method = 'mtmconvol';</div>
<div>cfg.taper = 'hanning';</div>
<div>cfg.foi = 4:1:40; % analysis 2 to 30 Hz in steps of 2 Hz </div>
<div>cfg.t_ftimwin = ones(length(cfg.foi),1).*0.5; % length of time window = 0.5 sec</div>
<div>cfg.toi = -0:0.05:2; % time window "slides" from -0.5 to 1.5 sec in steps of 0.05 sec (50 ms)</div>
<div>TFRhann = ft_freqanalysis(cfg, eeg);</div>
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<div>Do you have any suggestion about it?</div>
<div>Thank you very much for your attention.</div>
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<div>Worm regards,</div>
<div>Federica</div>
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