<div dir="ltr">Dear Vitoria,<div><br></div><div>Thanks for the tip.</div><div><br></div><div>I'm trying to perform a within-trial analysis.</div><div><br></div><div>I've got two sets of data, before and after resting state EEG activity. First set has 54 trials and second set has 51 trials. Hence, my cfg.design = [ones(1, 105); ones(1,54), ones(1,51)*2].</div>
<div><br></div><div>I've set up the statistical analysis like this:</div><div><br></div><div><div> cfg = [];</div><div> cfg.layout = lay;</div><div> cfg.channel = 'all';</div><div> cfg.latency = 'all';</div>
<div> cfg.trials = 'all';</div><div> cfg.frequency = 'all';</div><div> cfg.avgovertime = 'no';</div><div> cfg.avgoverfreq = 'no';</div><div> cfg.avgoverchan = 'no';</div>
<div> cfg.parameter = 'powspctrm';</div><div> cfg.method = 'montecarlo';</div><div> cfg.statistic = 'depsamplesT';</div><div> cfg.numrandomization = 1000;</div><div> cfg.design = design;</div>
<div> cfg.uvar = 1;</div><div> cfg.ivar = 2;</div><div> </div><div> [stat] = ft_freqstatistics(cfg, post_c200freq, pre_c200freq);</div></div><div><br></div><div>However, I got an error message:</div><div><br></div>
<div><div>Error using ft_statfun_depsamplesT (line 84)</div><div>Invalid specification of the design array.</div><div><br></div><div>Error in ft_statistics_montecarlo (line 285)</div><div> [statobs, cfg] = statfun(cfg, dat, design);</div>
<div><br></div><div>Error in ft_freqstatistics (line 323)</div><div> [stat, cfg] = statmethod(cfg, dat, cfg.design);</div></div><div><br></div><div>Can someone please tell me what parameters did I specify wrongly? Thanks.</div>
<div><br></div><div>Best wishes,</div><div>Hweeling</div><div><br></div><div><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On 21 March 2014 20:10, Vitória Piai <span dir="ltr"><<a href="mailto:v.piai.research@gmail.com" target="_blank">v.piai.research@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
Dear Hweeling, <br>
<br>
There is nothing inherent to the ft_freqstatistics function that
makes it special for MEG, rather than for EEG data. If you've been
using other FieldTrip functions, you probably have used cfg.channel
before. These are the channels present in your EEG data. <br>
How you should set some of the other parameters depends only on your
design, not on whether the data are from MEG or EEG.<br>
Maybe you can specify what is unclear to you when calling the
function so that you can get appropriate help!<br>
<br>
Good luck, Vitoria<div><div class="h5"><br>
<br>
<div>On 3/21/2014 3:36 PM, Hwee Ling Lee
wrote:<br>
</div>
</div></div><blockquote type="cite"><div><div class="h5">
<div dir="ltr"><br clear="all">
<div>Dear all,</div>
<div><br>
</div>
<div>I've got EEG datasets for 64 channels, and I would like to
perform permutation statistics on the power frequency analyses
to compare the two conditions (before and after resting state
periods).</div>
<div><br>
</div>
<div>However, I'm not sure how to operationalise the statistical
analyses since most of the examples on the website are for MEG
datasets.</div>
<div><br>
</div>
<div>I would appreciate very much if someone could help me on
this! Thanks!</div>
<div><br>
</div>
<div>Cheers,</div>
<div>Hweeling</div>
<div><br>
</div>
</div>
<br>
<fieldset></fieldset>
<br>
</div></div><pre>_______________________________________________
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<br>
</div>
</blockquote></div><br><br clear="all"><div><br></div>-- <br><div dir="ltr">=================================================<br>Dr. rer. nat. Lee, Hwee Ling<br>Postdoc<br>German Center for Neurodegenerative Diseases (DZNE) Bonn<br>
<br>Email 1: hwee-ling.lee<at><a href="http://dzne.de" target="_blank">dzne.de</a><br>Email 2: hweeling.lee<at><a href="http://gmail.com" target="_blank">gmail.com</a><div><br></div><div><a href="https://sites.google.com/site/hweelinglee/home" target="_blank">https://sites.google.com/site/hweelinglee/home</a><br>
<br>Correspondence Address:<br>Ernst-Robert-Curtius Strasse 12, 53117, Bonn, Germany<br>=================================================<br></div></div>
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