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<font size="3">Dear fieldtripers,
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<font size="3">I am having problems for fieldtrip to read the .cnt neuroscan files. I noticed that, when I am plotting my trials (using ft_databrower), I get trials that are exactly the same. The data in each sample of that trial, for each channel, looks exactly
the same! I don’t really know the reason for this and I have tried and checked different things:<o:p></o:p></font></p>
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<o:p><font size="3"> </font></o:p></p>
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<span style="mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin"><span style="mso-list: Ignore"><font size="3">1.</font><span style="FONT: 7pt "Times New Roman"">
</span></span></span><font size="3">My trl matrix is properly defined. It could be that the same sample numbers were used for extracting different trial numbers, but that is not the case.<o:p></o:p></font></p>
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<span style="mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin"><span style="mso-list: Ignore"><font size="3">2.</font><span style="FONT: 7pt "Times New Roman"">
</span></span></span><font size="3">Using curry to visualize the data showed that there is nothing wrong while converting my .dat into a .cnt file.<o:p></o:p></font></p>
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<span style="mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin"><span style="mso-list: Ignore"><font size="3">3.</font><span style="FONT: 7pt "Times New Roman"">
</span></span></span><font size="3">I notice that fieldtrip is using the loadcnt function from eeglab. For this reason I used eeglab to read the data. When I plot the trials using eeglab I don’t find these weird trials repetitions.<o:p></o:p></font></p>
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<span style="mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin"><span style="mso-list: Ignore"><font size="3">4.</font><span style="FONT: 7pt "Times New Roman"">
</span></span></span><span style="mso-bidi-font-family: "Courier New""><font size="3">The trials
<u>that are repeated</u></font><font size="3"> do not seem to be real (when I look into those trials repetitions using both with curry and eeglab the trials are completely different from what fieldtrip give me). Besides those weird repetitions or the other
trials seems to match.<o:p></o:p></font></span></p>
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<span style="mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin"><span style="mso-list: Ignore"><font size="3">5.</font><span style="FONT: 7pt "Times New Roman"">
</span></span></span><span style="mso-bidi-font-family: "Courier New""><font size="3">I do not get more trials then what I am asking for. My trl matrix has 312 rows and I get 312 trials. So those repeated trials are replacing some relevant information…<o:p></o:p></font></span></p>
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<span style="mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin"><span style="mso-list: Ignore"><font size="3">6.</font><span style="FONT: 7pt "Times New Roman"">
</span></span></span><font size="3"><span style="mso-bidi-font-family: "Courier New"">The data in each sample of those trials are the same, but the triggers are different. If I would continue with data analysis exactly the same trial would be latter classified
as belonging to different experimental conditions. </span><o:p></o:p></font></p>
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<span style="mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin"><span style="mso-list: Ignore"><font size="3">7.</font><span style="FONT: 7pt "Times New Roman"">
</span></span></span><font size="3">Importantly while I am extracting the trials from the data using ft_preprocessing I get a warning message saying “</font><span style="mso-bidi-font-family: "Courier New""><font size="3">events imported with a time shift might
be innacurate”.<o:p></o:p></font></span></p>
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<span style="mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin"><span style="mso-list: Ignore"><font size="3">8.</font><span style="FONT: 7pt "Times New Roman"">
</span></span></span><span style="mso-bidi-font-family: "Courier New""><font size="3">I am using the most recent version of fieldtrip (</font></span><font size="3">fieldtrip-20141021)<span style="mso-bidi-font-family: "Courier New""><o:p></o:p></span></font></p>
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<o:p><font size="3"> </font></o:p></p>
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<font size="3">Do you have any idea of what can be going on? I have been using fieldtrip before (.bdf files) and I never had this problem… Also, a colleague of mine is having the same exactly problem…
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<font size="3">Thank you very much in advance!</font></p>
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<font size="3">Inês Bramão</font></span></p>
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