<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Dear BJ Min,<div><br></div><div>I used the field trip version 20111101. I don't know if it's still available though.</div><div>To set the bitrate, you have to specify</div><div><br></div><div><div><span class="Apple-tab-span" style="white-space:pre"> </span>cfg.headerformat='ns_cnt32'; </div><div> cfg.dataformat='ns_cnt32'; </div><div> cfg.eventformat='ns_cnt32';</div></div><div><br></div><div>in ft_preprocessing</div><div><br></div><div>One way to check this (and also if you set your bitrate correctly), is to see if you can find easily detectable ERPs, like the visual or auditory N1 in your data. If you can't see this component, then your settings are wrong, even if data has been read into Matlab.</div><div><br></div><div>Good Luck,</div><div><br></div><div>Julian</div><div><br><div><div>Am 30.05.2013 um 10:15 schrieb Beom Jun Min:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div dir="ltr">Dear Julian Keil,<div><br></div><div style="">Thank you for your reply. </div><div style="">I agree with that your problem was similar with mine. </div><div style="">My data was acquired by Neuroscan also. </div><div style="">
There might a problem associated with .CNT file in the newer version.</div><div style=""><br></div><div style="">Could you tell me the number of the older version you used? </div><div style=""><br></div><div style="">Best Regards</div>
<div style=""><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">2013/5/29 Julian Keil <span dir="ltr"><<a href="mailto:julian.keil@gmail.com" target="_blank">julian.keil@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">Dear BJ Min,<div><br></div><div>what type of data are you trying to read in?</div><div>
I had similar problems when reading in .CNT data.</div><div>Also, with some systems you have to specify the bit rate (e.g. Neuroscan).</div><div>For me, reading in data with an older version of FieldTrip solved the problem, but this was in 2011, so I cannot say if the problem with .CNT files has been solved.</div>
<div><br></div><div>Good Luck</div><div><br></div><div>Julian</div><div><br><div>
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<div style="word-wrap:break-word;font-size:12px">********************</div><div style="word-wrap:break-word"><b>Dr. Julian Keil</b></div><div style="word-wrap:break-word"><b><br></b></div>AG Multisensorische Integration<br>
Psychiatrische Universitätsklinik<br>der Charité im St. Hedwig-Krankenhaus<br>Große Hamburger Straße 5-11, Raum E 307<br>10115 Berlin</div><div><br>Telefon: +49-30-2311-1879<br>Fax: +49-30-2311-2209 </div><div><a href="http://psy-ccm.charite.de/forschung/bildgebung/ag_multisensorische_integration" target="_blank">http://psy-ccm.charite.de/forschung/bildgebung/ag_multisensorische_integration</a></div>
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<br><div><div>Am 29.05.2013 um 11:47 schrieb Beom Jun Min:</div><br><blockquote type="cite"><div><div class="h5"><div dir="ltr"><div>Dear all,</div><div><br></div><div><span style="font-family:arial,sans-serif;font-size:14px">Hello, my name is BJ Min from Korea.</span><br>
</div><div><span style="font-family:arial,sans-serif;font-size:14px"><br>
</span></div><div>I'm dealing with EEG data of many subjects. </div><div><br></div><div>When I run ft_preprocessing, the error message below shows with only some files of my data. (not all files)</div><div><br></div>
<div>
Warning: rounding "endsample" to the nearest integer </div><div>> In ft_read_data at 100</div><div> In ft_preprocessing at 577</div><div>??? Error using ==> ft_read_data at 149</div><div>cannot read data after the end of the file</div>
<div><br></div><div>Error in ==> ft_preprocessing at 577</div><div> dat = ft_read_data(cfg.datafile, 'header', hdr, 'begsample', begsample, 'endsample', endsample, 'chanindx', rawindx,</div>
<div> 'checkboundary', strcmp(cfg.continuous, 'no'), 'dataformat', cfg.dataformat) </div><div><br></div><div>I think that there might be a kind of problem in data acquisition, and I modified below scripts in the ft_read_data function with comment %.</div>
<div><br></div><div>% % test whether the requested data segment is not outside the file</div><div>% if any(begsample<1)</div><div>% error('FILEIO:InvalidBegSample', 'cannot read data before the begin of the file');</div>
<div>% elseif any(endsample>(hdr.nSamples*hdr.nTrials))</div><div>% error('FILEIO:InvalidEndSample', 'cannot read data after the end of the file');</div><div>% end</div><div><br></div><div>After that, the ft_preprocessing worked well.</div>
<div><br></div><div>However, the files with the first problem showed additional warning message while running ft_definetrial. (not error message)</div><div><br></div><div>Warning: Integer operands are required for colon operator when used as index </div>
<div>> In fileio\private\loadcnt at 464</div><div> In ft_read_header at 1450</div><div> In ft_preprocessing at 398</div><div><br></div><div>Warning: rounding "endsample" to the nearest integer </div><div>> In ft_read_data at 100</div>
<div> In ft_preprocessing at 577</div><div><br></div><div>Also, during ft_redefinetrial, following warning message occurs.(not error message)</div><div><br></div><div>Warning: removing inconsistent sampleinfo </div><div>
> In ft_datatype_raw at 97</div><div> In ft_checkdata at 213</div><div> In ft_redefinetrial at 104</div><div><br></div><div>Warning: the trial definition in the configuration is inconsistent with the actual data </div>
<div>> In utilities\private\warning_once at 116</div><div> In utilities\private\fixsampleinfo at 74</div><div> In ft_datatype_raw at 154</div><div> In ft_checkdata at 213</div><div> In ft_redefinetrial at 206</div>
<div><br></div><div>Warning: reconstructing sampleinfo by assuming that the trials are consecutive segments of a continuous recording </div><div>> In utilities\private\warning_once at 116</div><div> In utilities\private\fixsampleinfo at 79</div>
<div> In ft_datatype_raw at 154</div><div> In ft_checkdata at 213</div><div> In ft_redefinetrial at 206</div><div><br></div><div>I wonder if these messages during ft_redefinetrial mean wrong defining trials. </div><div>
Should I continue these process like this, modifying the ft_preprocessing function? </div><div>Or, is it better to exclude some erroneous files?</div><div><br></div><div>Best regards</div><div><br></div>-- <br><div dir="ltr">
<div><font face="arial, helvetica, sans-serif">BeomJun Min, M.D.</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif"><span style="color:rgb(51,51,51);line-height:18px">Department of Medical System Engineering (DMSE)<br>
</span><span style="color:rgb(51,51,51);line-height:18px">Gwangju Institute of Science and Technology (GIST)</span><span style="color:rgb(51,51,51);line-height:18px"> </span><span style="color:rgb(51,51,51);line-height:18px"><br>
261 Cheomdan-gwagiro(Oryong-dong), Buk-gu, Gwangju <br>500-712, Republic of Korea (South) <br>Phone: +82-62-715-3266 / Fax: +82-62-715-3244 <br>E-mail: </span><a href="mailto:mbj0310@gmail.com" style="text-decoration:none;line-height:18px" target="_blank"><span>mbj0310@gmail.com</span></a><span style="color:rgb(51,51,51);line-height:18px">, <a href="http://bmssa.gist.ac.kr/" style="text-decoration:none" target="_blank">http://bmssa.gist.ac.kr</a></span></font><br>
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<div><font face="arial, helvetica, sans-serif">BeomJun Min, M.D.</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif"><span style="color:rgb(51,51,51);line-height:18px">Department of Medical System Engineering (DMSE)<br>
</span><span style="color:rgb(51,51,51);line-height:18px">Gwangju Institute of Science and Technology (GIST)</span><span style="color:rgb(51,51,51);line-height:18px"> </span><span style="color:rgb(51,51,51);line-height:18px"><br>
261 Cheomdan-gwagiro(Oryong-dong), Buk-gu, Gwangju <br>500-712, Republic of Korea (South) <br>Phone: +82-62-715-3266 / Fax: +82-62-715-3244 <br>E-mail: </span><a href="mailto:mbj0310@gmail.com" style="text-decoration:none;line-height:18px" target="_blank"><span>mbj0310@gmail.com</span></a><span style="color:rgb(51,51,51);line-height:18px">, <a href="http://bmssa.gist.ac.kr/" style="text-decoration:none" target="_blank">http://bmssa.gist.ac.kr</a></span></font><br>
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