<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Dear Arno,<div><br></div><div>I have tried the script you supplied me with but found a problem with it. The first part of the script (EEG=pop_select….) treats the data file as one continuous dataset; it ignores the events that mark the beginning and end of a trial. I would like to remove the first and last ten seconds within the boundaries of a trial delimited by the events marking the beginning and end of a trial. As it is the script merely removes the first 10 seconds of the continuous data and last ten seconds of the same continuous data. Let's say A marks beginning of trial 1 and B marks the end of the same trial - I would like to remove the first and last 10 seconds within the block marked by events A and B. And so on for the rest of trails within the same data file. Is this possible? Is there a way of doing this by using some script? Any help you could provide me with would be greatly appreciated.</div><div><br></div><div>Thanks and regards,</div><div>Marco</div><div><br><div><div>On 11 May 2012, at 05:54, Arnaud Delorme wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Marco,<div><br></div><div>to do what you want to do, you should type in</div><div><br></div><div>EEG = pop_select(EEG, 'time', [10 EEG.xmax-10]); % remove the first and last 10 seconds</div><div>EEG = eeg_regepoch(EEG, 'recurrence', 2); % divide into 2 seconds non-overlaping blocks</div><div><br></div><div>Best,</div><div><br></div><div>Arno</div><div><br></div><div><div><div>On May 5, 2012, at 6:38 PM, Stephen Politzer-Ahles wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><meta http-equiv="Content-Type" content="text/html; charset=utf-8">Hi Marco,<br><br>I haven't tried this myself, but you should be able to get any of these epochs from the same event using pop_epoch. Assuming that you have an event marking the beginning of the block, then the first epoch you want (i.e. 10-12 seconds after the event) would be<br>
<br><div style="margin-left:40px">OUTEEG = pop_epoch( EEG, {events}, [10 12]);<br></div><br>the second would be<br><br><div style="margin-left:40px">OUTEEG = pop_epoch( EEG, {events}, [12 14]);<br></div><br>etc.<br><br>Best,<br>
Steve<br><br><div class="gmail_quote">On Sat, May 5, 2012 at 4:33 PM, Marco Montalto <span dir="ltr"><<a href="mailto:montaltomarco@onvol.net" target="_blank">montaltomarco@onvol.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Dear List,<br>
<br>
In my experiment I have three conditions and each trial is 30 seconds long. I ignore the first and last 10 seconds of each block and the middle 10-second block I divide into epochs of 2-second duration. Currently I am doing this manually through the EEGLAB GUI by placing an event (with the same 'type' for blocks from the same condition) at every two seconds (in the middle 10-second block) and then extracting epochs around those events. Would anyone know whether there is a more automated and a faster way of doing this? Thanks in advance.<br>
<br>
Regards,<br>
Marco Montalto<br>
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