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Dear Jan-Mathijs <br>
<br>
Brilliant, thanks for getting back to me. I have it working now with the second step :)<br>
<br>
Many thanks<br>
Lizzie<br>
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Lizzie Shephard, PhD<br>
Postdoctoral researcher<br>
2.21 MRC SGDP Centre<br>
Institute of Psychiatry, Psychology, & Neuroscience<br>
King’s College London<br>
De Crespigny Park<br>
London, SE5 8AF<br>
0207 848 5272<br>
elizabeth.1.shephard@kcl.ac.uk<br>
<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> fieldtrip-bounces@science.ru.nl <fieldtrip-bounces@science.ru.nl> on behalf of Schoffelen, J.M. (Jan Mathijs) <jan.schoffelen@donders.ru.nl><br>
<b>Sent:</b> 06 October 2016 15:35:39<br>
<b>To:</b> FieldTrip discussion list<br>
<b>Subject:</b> Re: [FieldTrip] Outputting average power with ft_freqanalysis</font>
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<div>Dear Lizzie,
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<div class="">You haven’t done anything wrong, and the output is exactly as expected. You almost solved it yourself, since indeed you would want to need the option cfg.avgoverfreq = ‘yes’, but this should be invoked in another function:</div>
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<div class="">cfg = [];</div>
<div class="">cfg.avgoverfreq = ‘yes’;</div>
<div class="">FFThann = ft_freqanalysis(cfg, FFThann);</div>
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<div class="">Best wishes,</div>
<div class=""><br class="">
</div>
<div class="">Jan-Mathijs</div>
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<blockquote type="cite" class="">
<div class="">On 06 Oct 2016, at 16:03, Shephard, Elizabeth <<a href="mailto:elizabeth.1.shephard@kcl.ac.uk" class="">elizabeth.1.shephard@kcl.ac.uk</a>> wrote:</div>
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<div style="margin-top: 0px; margin-bottom: 0px;" class="">Dear all</div>
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<div style="margin-top: 0px; margin-bottom: 0px;" class="">I am fairly new to FieldTrip so apologies if this is a very basic question...</div>
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<div style="margin-top: 0px; margin-bottom: 0px;" class="">I am using ft_freqanalysis and wanted to obtain average power values in frequency bands rather than power values at particular frequencies. So, following the documentation online, I specified the following:</div>
<div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class="">
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<p style="margin-top: 0px; margin-bottom: 0px;" class=""></p>
<div class="">cfg = [];</div>
<div class=""><span style="font-size: 12pt;" class="">cfg.method = 'mtmfft'; </span><br class="">
</div>
<div class="">cfg.taper = 'hanning'; </div>
<div class="">cfg.foilim = [1 3]; % get power in delta range</div>
<div class=""><span style="font-size: 12pt;" class="">cfg.keeptrials = 'yes';</span><br class="">
</div>
<div class="">cfg.output = 'pow';</div>
<div class="">FFThann = ft_freqanalysis(cfg, data);</div>
<div class=""><br class="">
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<div class="">But the powspctrm field I get in FFThann gives power values for 0.5 Hz steps across the 1-3 Hz range, rather than a single average power value for the 1-3 Hz range. </div>
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<div class="">I was wondering if I have specified something incorrectly? I've also tried adding "<span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;" class="">cfg.avgoverfreq
= 'yes';" but this doesn't change the output.</span></div>
<div class=""><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;" class=""><br class="">
</span></div>
<div class=""><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;" class="">Many thanks in advance</span></div>
<div class=""><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;" class="">Lizzie </span></div>
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<div style="margin-top: 0px; margin-bottom: 0.0001pt;" class=""><span style="font-family: Garamond, serif; color: rgb(31, 73, 125);" class="">Lizzie Shephard, PhD</span><span style="font-family: Garamond, serif;" class=""></span></div>
<div style="margin-top: 0px; margin-bottom: 0.0001pt;" class=""><span style="font-family: Garamond, serif; color: rgb(31, 73, 125);" class="">Postdoctoral researcher</span><span style="font-family: Garamond, serif;" class=""></span></div>
<div style="margin-top: 0px; margin-bottom: 0.0001pt;" class=""><span style="font-family: Garamond, serif; color: rgb(31, 73, 125);" class="">2.21 MRC SGDP Centre</span><span style="font-family: Garamond, serif;" class=""></span></div>
<div style="margin-top: 0px; margin-bottom: 0.0001pt;" class=""><span style="font-family: Garamond, serif; color: rgb(31, 73, 125);" class="">Institute of Psychiatry, Psychology, & Neuroscience</span><span style="font-family: Garamond, serif;" class=""></span></div>
<div style="margin-top: 0px; margin-bottom: 0.0001pt;" class=""><span style="font-family: Garamond, serif; color: rgb(31, 73, 125);" class="">King’s College London</span><span style="font-family: Garamond, serif;" class=""></span></div>
<div style="margin-top: 0px; margin-bottom: 0.0001pt;" class=""><span style="font-family: Garamond, serif; color: rgb(31, 73, 125);" class="">De Crespigny Park</span><span style="font-family: Garamond, serif;" class=""></span></div>
<div style="margin-top: 0px; margin-bottom: 0.0001pt;" class=""><span style="font-family: Garamond, serif; color: rgb(31, 73, 125);" class="">London, SE5 8AF</span><span style="font-family: Garamond, serif;" class=""></span></div>
<div style="margin-top: 0px; margin-bottom: 0.0001pt;" class=""><span style="font-family: Garamond, serif; color: rgb(31, 73, 125);" class="">0207 848 5272</span><span style="font-family: Garamond, serif;" class=""></span></div>
<div style="margin-top: 0px; margin-bottom: 0.0001pt;" class=""><span style="font-family: Garamond, serif; color: rgb(31, 73, 125);" class=""><a href="mailto:elizabeth.1.shephard@kcl.ac.uk" class="">elizabeth.1.shephard@kcl.ac.uk</a></span></div>
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