<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Dear Kimberly,<div><br></div><div>you may also change the EEGLAB option to use memory mapped data (which means that the data stays on disk so there is no memory limitation). Use menu item "File > Memory and other options" and check "use memory mapped".</div><div><br></div><div>Then import your data file (you might have to check a box to import your file in memory mapped format when you import your neuroscan file as well).</div><div><br></div><div>Best,</div><div><br></div><div>Arno</div><div><br></div><div><div><div>On 22 Jan 2013, at 16:12, 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 Kimberly,<br><br>I've also had issues opening .cnt files even smaller (~1 GB). Do you definitely need to open the continuous data, or can you use the epoched (.eeg) data? For most of my analysis I epoch the data in Neuroscan and then import the epoched data into EEGLAB, and then usually don't get memory issues.<br>
<br>I've also had luck using a different computer with 64-bit Windows 7 and 8 GB of RAM. And I've heard that Unix-based OSes are much better with memory and MATLAB, although I haven't tried myself.<br><br>Best,<br>
Steve<br><br><div class="gmail_quote">On Sun, Jan 20, 2013 at 3:28 PM, Kimberly Talboom <span dir="ltr"><<a href="mailto:kwingert1009@yahoo.com" target="_blank">kwingert1009@yahoo.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div><div style="font-size:12pt;font-family:times new roman,new york,times,serif"><div>Good afternoon,</div><div><br></div><div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif">
<br></div><div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif">Our laboratory's .cnt files are 3.5 GB give or take a GB depending on the research paradigm, and I am having a really difficult time getting the files to open in EEGLAB. Neuroscan can open smaller files but has also had issues exporting large data files to EEGLAB.</div>
<div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif"><br></div><div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif">
To attenuate the issues with RAM availability and file size, Neuroscan suggested that I:</div><div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif">
<br></div><div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif"><br></div><div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif">
1) Down-sample when I can</div><div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif">2) I guess there is a compiled version of EEGLAB
(i.e., rather than interpreted code) that may help, but is not recommended?</div><div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif">
<br></div><div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif"><br></div><div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif">
I can get the files to open, but it takes an hour, and then it takes another hour each time I press a button.</div><div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif">
<br></div><div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif">I am running an i7 (laptop)/ i5 (desktop), both are 64 bit 4GB RAM. I have the 64 bit version of MATLAB.</div>
<div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif"><br></div><div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif">
<br></div><div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif">If anyone has had a similar problem and has found a way around it, I would appreciate the help.</div>
<div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif"><br></div><div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif">
<br></div><div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif"><br></div><div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif">
Thank you,</div><div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif"><br></div><div style="font-style:normal;font-size:16px;background-color:transparent;font-family:'times new roman','new york',times,serif">
Kimberly Talboom</div></div></div><br>_______________________________________________<br>
Eeglablist page: <a href="http://sccn.ucsd.edu/eeglab/eeglabmail.html" target="_blank">http://sccn.ucsd.edu/eeglab/eeglabmail.html</a><br>
To unsubscribe, send an empty email to <a href="mailto:eeglablist-unsubscribe@sccn.ucsd.edu">eeglablist-unsubscribe@sccn.ucsd.edu</a><br>
For digest mode, send an email with the subject "set digest mime" to <a href="mailto:eeglablist-request@sccn.ucsd.edu">eeglablist-request@sccn.ucsd.edu</a><br></blockquote></div><br><br clear="all"><br>-- <br>Stephen Politzer-Ahles<br>
University of Kansas<br>Linguistics Department<br><a href="http://people.ku.edu/~sjpa/" target="_blank">http://people.ku.edu/~sjpa/</a>
_______________________________________________<br>Eeglablist page: <a href="http://sccn.ucsd.edu/eeglab/eeglabmail.html">http://sccn.ucsd.edu/eeglab/eeglabmail.html</a><br>To unsubscribe, send an empty email to <a href="mailto:eeglablist-unsubscribe@sccn.ucsd.edu">eeglablist-unsubscribe@sccn.ucsd.edu</a><br>For digest mode, send an email with the subject "set digest mime" to <a href="mailto:eeglablist-request@sccn.ucsd.edu">eeglablist-request@sccn.ucsd.edu</a></blockquote></div><br></div></body></html>