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</head><body><p>Hello Leila,<br></p><p>have you tried to import only one of your 51 channels?<br></p><p>If this works you could cut the data or downsample it and then combine all channels in a later step.<br></p><p>Best,<br></p><p>Anja<br></p><p><br></p><blockquote type="cite"><p>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>*****************************************</p></blockquote></body></html>