<div dir="ltr"><div>Dear. Stephen Politzer-Ahles,</div><div><br></div>Thank you very much!<div>I found their was a problem in the event value and solved it all.</div><div>What I did is eliminating all event values and rewrite, and extracting epochs again.</div>
<div>Hope to be helpful for anybody who struggling with same problem.</div><div><br></div><div>Best wishes,</div><div><br></div><div>Chung-Yeon Lee</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">2013/9/28 Stephen Politzer-Ahles <span dir="ltr"><<a href="mailto:politzerahless@gmail.com" target="_blank">politzerahless@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi Chung-yeon,<div><br></div><div>Are you sure? If it works correctly, EEG.data should be a three-dimensional data structure (number of channels x number of samples x number of trials)--you can check this by typing size(EEG.data) or ndims(EEG.data)at the command line.</div>
<div><br></div><div>Once you've epoched, EEG.pnts, EEG.xmin, EEG.xmax, and EEG.times (and any other time-related fields that I might be forgetting) will be reflecting the time (or points) in one epoch, not the time (or points) in the whole dataset. Which might be why your data look like it's just 3 seconds.</div>
<div><br></div><div>If it didn't work this way, we might need more information about the nature of your event markers, and how you ran Extract Epochs, to figure out what the problem is. My first guess would be there, if you have 20 different event markers (instead of 20 repetitions of the same marker), you may have selected just one event type instead of all of them; or even if it's 20 of the same marker, you may have only selected the first event.</div>
<div><br></div><div>Best,</div><div>Steve</div></div><div class="gmail_extra"><div class="im"><br clear="all"><div><div dir="ltr"><div><br></div><div><br></div>Stephen Politzer-Ahles<br>New York University, Abu Dhabi<br>
Neuroscience of Language Lab<br>
<a href="http://www.nyu.edu/projects/politzer-ahles/" target="_blank">http://www.nyu.edu/projects/politzer-ahles/</a><br></div></div>
<br><br></div><div><div class="h5"><div class="gmail_quote">On Sat, Sep 28, 2013 at 3:54 AM, Chung-yeon Lee <span dir="ltr"><<a href="mailto:jamixlee@gmail.com" target="_blank">jamixlee@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<p dir="ltr">Extract Epochs (pop_epochs) makes the data has 3 seconds length.<br>
Is this right result?<br>
But I want 20trials(epochs) x 3sec(-1~2) data.<br>
</p>
<div class="gmail_quote">2013. 9. 28. 오전 4:52에 "Stephen Politzer-Ahles" <<a href="mailto:politzerahless@gmail.com" target="_blank">politzerahless@gmail.com</a>>님이 작성:<div><div><br type="attribution">
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Hello Chung-Yeon<div><br></div><div>From the GUI you can select Tools > Extract Epochs -- see <a href="http://sccn.ucsd.edu/wiki/Chapter_05:_Extracting_Data_Epochs" target="_blank">http://sccn.ucsd.edu/wiki/Chapter_05:_Extracting_Data_Epochs</a>.</div>
<div><br></div><div>Best,</div><div>Steve</div></div><div class="gmail_extra"><br clear="all"><div><div dir="ltr"><div><br></div><div><br></div>Stephen Politzer-Ahles<br>New York University, Abu Dhabi<br>Neuroscience of Language Lab<br>
<a href="http://www.nyu.edu/projects/politzer-ahles/" target="_blank">http://www.nyu.edu/projects/politzer-ahles/</a><br></div></div>
<br><br><div class="gmail_quote">On Fri, Sep 27, 2013 at 11:14 AM, Chung-yeon Lee <span dir="ltr"><<a href="mailto:jamixlee@gmail.com" target="_blank">jamixlee@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 dir="ltr">I have continuous EEG data with 20 event markers.<div>How to convert this data to epoched data with latency from -1 to 2?</div><div>I found other epoched data has 3 dimensional data structure in 'EEG.data'.</div>
<div>However mine is 2 dimensional data.</div><div>Please anybody help me to solve this problem.</div><div>Thank you!<span><font color="#888888"><br clear="all"><div><br></div>-- <br><div><b>Chung-Yeon Lee<br>
</b>Biointelligence Laboratory<br>Seoul National University<br>
<a href="tel:%2B82-10-7510-7150" value="+821075107150" target="_blank">+82-10-7510-7150</a></div>
<div><a href="http://bi.snu.ac.kr/~cylee" target="_blank">http://bi.snu.ac.kr/~cylee</a></div>
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