<div dir="ltr">Lorena,<div>As far as I know, I don't think there is a way currently built into FieldTrip to adjust all experimental trials by the same separate baseline period, but it is something I also prefer to do, since my pre-trial "baselines" change across conditioning in my behavioral paradigm. I've written a custom function to perform this on my data, and it is part of the code I'm offering to share in the email I just sent out asking another question that relates to baseline correction and other issues. Are you interested?</div><div><br></div><div>~Teresa</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Dec 12, 2016 at 12:47 AM, Lorena Santamaria Covarrubias <span dir="ltr"><<a href="mailto:lorenalsc@hotmail.com" target="_blank">lorenalsc@hotmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p>Hi Matt,</p>
<p><br>
</p>
<p>Thank you for you reply Matt. <br>
</p>
<p>I am working with ECoG. The tasks that participants have to perform is movements of hand and tongue, indicated by a visual stimuli.
<br>
</p>
<p>Five repetitions each motor task followed by a fixation cross on the screen and then the next motor task, in a random order.
<br>
</p>
<p>Resting state were recorded prior to the motor tasks during 5 minutes were participants has to look to a fixation cross and not perform any movement.</p>
<p>If you need any other information please let me know.</p>
<p>Thank you.<br>
</p>
<br>
<br>
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<div id="m_4064819290498419498divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>De:</b> <a href="mailto:fieldtrip-bounces@science.ru.nl" target="_blank">fieldtrip-bounces@science.ru.<wbr>nl</a> <<a href="mailto:fieldtrip-bounces@science.ru.nl" target="_blank">fieldtrip-bounces@science.ru.<wbr>nl</a>> en nombre de Matt Gerhold <<a href="mailto:matt.gerhold@gmail.com" target="_blank">matt.gerhold@gmail.com</a>><br>
<b>Enviado:</b> lunes, 12 de diciembre de 2016 5:26<br>
<b>Para:</b> FieldTrip discussion list<br>
<b>Asunto:</b> Re: [FieldTrip] time-frequeny analysis task vs resting</font>
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<div>What do your tasks entail? Can you provide more specific details regarding your experimental design? That will help clarify what the best analytical work-flow will be in your case.<br>
<br>
</div>
Matt<br>
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<div class="gmail_extra"><br>
<div class="gmail_quote">On Mon, Dec 12, 2016 at 3:37 AM, Lorena Santamaria Covarrubias
<span dir="ltr"><<a href="mailto:lorenalsc@hotmail.com" target="_blank">lorenalsc@hotmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div id="m_4064819290498419498m_-1921113990688985757divtagdefaultwrapper" dir="ltr" style="font-size:12pt;color:#000000;font-family:Calibri,Arial,Helvetica,sans-serif">
<p>Good morning,</p>
<p><br>
</p>
<p>I am new in this topic and I have a basic question about baseline correction (ft_freqbaseline) when I am trying to study the time frequency analysis of task versus resting period.</p>
<p><br>
</p>
<p>I have two data-sets, one with the tasks information, 64 channels x 1s epoch x 100 trials (50 trials task1 and 50 trials task2) and then 5 minutes of continuous recording for resting state.
<br>
</p>
<p>I obtained the power spectrum for both tasks:</p>
<p><br>
</p>
<p></p>
<div>cfg = [];<br>
cfg.output = 'pow';<br>
cfg.method = 'tfr';<br>
cfg.foi = 8:1:130;<br>
cfg.toi = 0.3:0.01:1.3;<br>
cfg.keeptrials = 'no';<br>
<br>
cfg.trials = find(epoch_data.trialinfo == 1);<br>
Task<span>1</span>Spec= ft_freqanalysis(cfg,epoch_data<wbr>);<br>
<br>
cfg.trials = find(epoch_data.trialinfo == 2);<br>
Task2Spec = ft_freqanalysis(cfg,epoch_data<wbr>);<br>
</div>
<br>
<p>But now I don't know how to do the baseline correction with the 5 minutes continuous data to can compare the power spectrum of both tasks in relation to the resting state. </p>
<p>Maybe I missing something pretty basic, apologies in advance for it if this is the case.</p>
<p>Any suggestions will be appreciated.</p>
<p>Thanks!!<br>
</p>
<p><br>
</p>
<p><br>
</p>
<p></p>
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<br>
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</blockquote>
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<br>______________________________<wbr>_________________<br>
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