<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">Hi Eve,<DIV><BR class="khtml-block-placeholder"></DIV><DIV>just to chip in here: what (in simple terms) do you want to achieve using wavelet analysis of your data? What do you ultimately want to plot?</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Christian</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><BR><DIV><DIV>On 30 Mar 2007, at 15:49, alotof eve wrote:</DIV><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite"><DIV>Dear Jan and Nathan,</DIV> <DIV> </DIV> <DIV> Thank you so much. But I am 80 percent sure it's not a common memory problem. My computer is 1GB of RAM. And if I don't use combination, I can select very fine parameters for wavelet analysis. My data is neuromag .fif data. I suppose something wrong with the channel counting.</DIV> <DIV> Thanks.</DIV> <DIV> </DIV> <DIV>Best,</DIV> <DIV>eve<BR><BR><B><I>Jan Mathijs Schoffelen <<A href="mailto:Jan.Schoffelen@FCDONDERS.RU.NL">Jan.Schoffelen@FCDONDERS.RU.NL</A>></I></B> wrote:</DIV> <BLOCKQUOTE class="replbq" style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">Dear Eve,<BR><BR>I totally agree with Nathan. Specifying (unintended, but still... ;o) )<BR>'powandcsd', in particular in combination with a spectro-temporal<BR>reconstruction really blows up your memory requirements. Especially when<BR>(again probably unintended) you are computing csd's for all<BR>channelcombination. I'll leave it up to you to calculate how many bytes are<BR>needed only to represent your output csd-matrix in memory.<BR>Some hints:<BR>-each double precision number requires 8 bytes of memory in matlab<BR>-each complex number consists of two double precision numbers<BR>-(numberoftrials)x(numberofchannelcombinations)x(numberoffrequencypoints)x<BR>(numberoftimepoints) can become really big. <BR><BR>Yours,<BR><BR>Jan-Mathijs<BR><BR>-----Original Message-----<BR>From: FieldTrip discussion list [<A href="mailto:FIELDTRIP@NIC.SURFNET.NL">mailto:FIELDTRIP@NIC.SURFNET.NL</A>] On Behalf<BR>Of Nathan Weisz<BR>Sent: Friday, March 30, 2007 9:31 AM<BR>To: <A href="mailto:FIELDTRIP@NIC.SURFNET.NL">FIELDTRIP@NIC.SURFNET.NL</A><BR>Subject: Re: [FIELDTRIP] problem on wavelet analysis, combine channel<BR><BR>hi eve,<BR><BR>i'm not too familiar with the fieldtrip specifications, but:<BR><BR>> Out of memory. Type HELP MEMORY for your options.<BR><BR>do you have enough RAM?<BR><BR>this would then not be a real fieldtrip problem, but a rather common <BR>problem generally when using matlab.<BR><BR>good luck!<BR><BR>nathan<BR></BLOCKQUOTE><BR><DIV> <BR class="khtml-block-placeholder"></DIV><HR size="1">Expecting? Get great news right away with <A href="http://us.rd.yahoo.com/evt=49982/*http://advision.webevents.yahoo.com/mailbeta/newmail_tools.html">email Auto-Check.</A><BR>Try the <A href="http://us.rd.yahoo.com/evt=49982/*http://advision.webevents.yahoo.com/mailbeta/newmail_tools.html">Yahoo! 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