<html><head></head><body><div style="color:#000; background-color:#fff; font-family:garamond, new york, times, serif;font-size:16px"><div id="yui_3_16_0_1_1450430167445_25819"><span></span></div><div id="yui_3_16_0_1_1450430167445_25951"><div id="yui_3_16_0_1_1450430167445_25952"> Thanks for your reply Anja.</div><div dir="ltr" id="yui_3_16_0_1_1450430167445_26101">I need to have all the channel information at a segment of time to decide if it there is seizure occurring. Down sampling will loose the information and I am not sure if I want to go that way, as I need to do some feature extractions/classification etc on the data.</div><div id="yui_3_16_0_1_1450430167445_26267" dir="ltr"><br></div><div id="yui_3_16_0_1_1450430167445_26410" dir="ltr">Not sure how I could cut the data in fieldtrip. Do you know?</div><div id="yui_3_16_0_1_1450430167445_26411" dir="ltr">Thanks</div><div dir="ltr">Best regards<br></div></div><div id="yui_3_16_0_1_1450430167445_26105" class="signature"><div id="yui_3_16_0_1_1450430167445_26104"><font id="yui_3_16_0_1_1450430167445_26103" color="#000000"><div id="yui_3_16_0_1_1450430167445_26102" style="font-family:'bookman old style', 'new york', times, serif;margin-top:0cm;margin-right:0cm;margin-bottom:0pt;margin-left:0cm;" class="MsoPlainText"><span style=""><font face="times new roman, new york, times, serif"><font size="2">___________________________________________________</font></font></span></div> <div id="yui_3_16_0_1_1450430167445_26106" style="font-family:'bookman old style', 'new york', times, serif;margin-top:0cm;margin-right:0cm;margin-bottom:0pt;margin-left:0cm;" class="MsoPlainText"><span style=""><font face="times new roman, new york, times, serif"><font size="2">Leila Ayoubian</font></font></span></div> <div style="margin-top:0cm;margin-right:0cm;margin-bottom:0pt;margin-left:0cm;" class="MsoPlainText"><font class="Apple-style-span" size="2" face="'times new roman', 'new york', times, serif"><br></font></div></font></div><div style="MARGIN:0cm 0cm 0pt;" class="MsoPlainText"><font color="#000000"><font style="" face="bookman old style, new york, times, serif"><font face="bookman old style, new york, times, serif"><font color="#000000"><span style="color:rgb(84, 140, 214);font-size:9pt;font-family:Arial;" lang="EN-US"><span style="font-size:10pt;font-family:sans-serif;"><font face="bookman old style, new york, times, serif"></font></span></span></font></font></font></font></div></div><br> <div id="yui_3_16_0_1_1450430167445_26412" class="qtdSeparateBR"><br><br></div><div style="display: block;" id="yui_3_16_0_1_1450430167445_26416" class="yahoo_quoted"> <div id="yui_3_16_0_1_1450430167445_26415" style="font-family: garamond, new york, times, serif; font-size: 16px;"> <div id="yui_3_16_0_1_1450430167445_26414" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_1_1450430167445_26413" dir="ltr"> <font size="2" face="Arial"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> Anja Pflug <anja.pflug@musterkind.eu><br> <b><span style="font-weight: bold;">To:</span></b> fieldtrip@science.ru.nl <br> <b><span style="font-weight: bold;">Sent:</span></b> Friday, December 18, 2015 1:06 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> [FieldTrip] Importing large edf data<br> </font> </div> <div id="yui_3_16_0_1_1450430167445_26419" class="y_msg_container"><br><div id="yiv0433007103">
<div id="yui_3_16_0_1_1450430167445_26418"><div>Hello Leila,<br></div><div id="yui_3_16_0_1_1450430167445_26417">have you tried to import only one of your 51 channels?<br></div><div>If this works you could cut the data or downsample it and then combine all channels in a later step.<br></div><div>Best,<br></div><div>Anja<br></div><div><br></div><blockquote type="cite"><div>fieldtrip-request@science.ru.nl hat am 18. Dezember 2015 um 12:00 geschrieben:<br><br><br>Send fieldtrip mailing list submissions to<br> fieldtrip@science.ru.nl<br><br>To subscribe or unsubscribe via the World Wide Web, visit<br> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip<br>or, via email, send a message with subject or body 'help' to<br> fieldtrip-request@science.ru.nl<br><br>You can reach the person managing the list at<br> fieldtrip-owner@science.ru.nl<br><br>When replying, please edit your Subject line so it is more specific<br>than "Re: Contents of fieldtrip digest..."<br><br><br>Today's Topics:<br><br> 1. importing large edf data (Leila Ayoubian)<br><br><br>----------------------------------------------------------------------<br><br>Message: 1<br>Date: Fri, 18 Dec 2015 09:43:43 +0000 (UTC)<br>From: Leila Ayoubian <leilayou_54@yahoo.com><br>To: "fieldtrip@science.ru.nl" <fieldtrip@science.ru.nl><br>Subject: [FieldTrip] importing large edf data<br>Message-ID:<br> <807603762.476165.1450431823359.JavaMail.yahoo@mail.yahoo.com><br>Content-Type: text/plain; charset="utf-8"<br><br>Hi:Thanks for providing us with this amazing toolbox.<br>I am new to fieldtrip. I am trying to import EEG data in the format of *.edf for the purpose of seizure detection for epileptic patients. I can't break up the data as you understand the detection has to have continuous data. However I could load section of the data at a time and clear what is already used and reload again.?<br>So trying to load the data like this:<br>cfg.dataset= ('mydata.edf');<br>rawdata=ft_preprocessing(cfg);<br>This is the error message I get :<br>%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%<br>Error using zeros<br>Requested 51x51927040 (19.7GB) array exceeds maximum array size preference. Creation of arrays greater than this limit may take a long time<br>and cause MATLAB to become unresponsive. See array size limit or preference panel for more information.<br><br>Error in read_edf (line 403)<br>? dat = zeros(length(chanindx),nepochs*epochlength);<br><br>Error in ft_read_data (line 622)<br>??? dat = read_edf(filename, hdr, begsample, endsample, chanindx);<br><br>Error in ft_preprocessing (line 566)<br>????? dat = ft_read_data(cfg.datafile, 'header', hdr, 'begsample', begsample, 'endsample', endsample, 'chanindx', rawindx, 'checkboundary',<br>????? strcmp(cfg.continuous, 'no'), 'dataformat', cfg.dataformat);<br><br>Error in ReadFedfiles (line 8)<br>rawdata=ft_preprocessing(cfg);%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%<br>I tried the ft_redefinetrial, but since the input to this file is the output from ft-PREPROCESSING it gives me the same error. <br><br><br>I also tried to use ft_read_data to choose the samples I want to load :?filename???? = 'mydata.edf'<br>?hdr?? = ft_read_header(filename);<br>?sample.start=1<br>?sample.end=100<br>dat = ft_read_data(filename,'sample.start','1','sample.end','100') <br>and here is again the error message:<br>Error using zeros<br>Requested 51x51927040 (19.7GB) array exceeds maximum array size preference. Creation of arrays greater than this limit may take a<br>long time and cause MATLAB to become unresponsive. See array size limit or preference panel for more information.<br><br>Error in read_edf (line 403)<br>? dat = zeros(length(chanindx),nepochs*epochlength);<br><br>Error in ft_read_data (line 622)<br>??? dat = read_edf(filename, hdr, begsample, endsample, chanindx);<br><br>Error in ReadFedfiles (line 31)<br>dat = ft_read_data(filename,'sample.start','1','sample.end','100')<br>?<br>>> <br><br>Could you please direct me as to which functions and in which order I should be using the functions to load data in smaller samples.Some examples would be useful.<br>Thanks again for your support and assistance. <br>We appreciate your effort.<br>Kind regards<br><br>___________________________________________________ Dr. Leila Ayoubian <br>-------------- next part --------------<br>An HTML attachment was scrubbed...<br>URL: <http://mailman.science.ru.nl/pipermail/fieldtrip/attachments/20151218/6dfa7ce1/attachment-0001.html><br><br>------------------------------<br><br>_______________________________________________<br>fieldtrip mailing list<br>fieldtrip@donders.ru.nl<br>http://mailman.science.ru.nl/mailman/listinfo/fieldtrip<br><br>End of fieldtrip Digest, Vol 61, Issue 14<br>*****************************************</div></blockquote></div></div><br>_______________________________________________<br>fieldtrip mailing list<br><a ymailto="mailto:fieldtrip@donders.ru.nl" href="mailto:fieldtrip@donders.ru.nl">fieldtrip@donders.ru.nl</a><br><a href="http://mailman.science.ru.nl/mailman/listinfo/fieldtrip" target="_blank">http://mailman.science.ru.nl/mailman/listinfo/fieldtrip</a><br><br></div> </div> </div> </div></div></body></html>