<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi Mona, <div class=""><br class=""></div><div class="">the default setting in ft_databrowser for continuous data is to show blocksizes of 1 sec. Given your sampling rate, I guess the 0.998164 seconds is the closest time point to that. </div><div class="">Then if, you have 15445 segments, each approx. 1 second long, you end up with more than 4 hours of data.</div><div class="">However, the data.time you end up with might not be continuous because the data.time you concatenate probably is not continuous but rather starts for each file at 0.</div><div class=""><br class=""></div><div class="">Hope this helps a bit</div><div class="">Anne</div><div class=""><br class=""></div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">Am 20.10.2016 um 00:44 schrieb Wong-Barnum, Mona <<a href="mailto:mona@sdsc.edu" class="">mona@sdsc.edu</a>>:</div><br class="Apple-interchange-newline"><div class="">
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<div class="">Hi Jan-Mathijs:</div>
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<span class="Apple-tab-span" style="white-space:pre"></span>Yes, these should be continuous time recordings, just broken up and saved into separate files, each file represents about 20 minutes of recording so the end of one file should be the beginning of the
next file.
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<div class=""><span class="Apple-tab-span" style="white-space:pre"></span>I tried your suggestion but it seems the cat didn’t work. Do you spot any problem with my steps:</div>
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>> addpath /path/to/fieldtrip</div>
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>> ft_defaults</div>
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>> data = importdata ( ‘appended.mat' )</div>
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data = </div>
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<div style="margin: 0px; font-family: 'Andale Mono'; background-color: rgb(223, 219, 196);" class="">
label: {389x1 cell}</div>
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trial: {1x14 cell}</div>
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time: {1x14 cell}</div>
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fsample: 603.1072</div>
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cfg: [1x1 struct]</div>
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>> whos</div>
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Name Size Bytes Class Attributes</div>
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data 1x1 29058186864 struct </div>
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>> trial{1} = cat(2,data.trial{:});</div>
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>> time{1} = cat(2,data.time{:});</div>
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>> whos</div>
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Name Size Bytes Class Attributes</div>
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data 1x1 29058186864 struct </div>
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time 1x1 74505712 cell </div>
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trial 1x1 28982678512 cell</div><div style="margin: 0px; font-family: 'Andale Mono'; background-color: rgb(223, 219, 196); min-height: 20px;" class="">
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<div style="margin: 0px; font-family: 'Andale Mono'; background-color: rgb(223, 219, 196);" class="">
>> data.trial = trial;</div>
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>> data.time = time;</div>
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>> data</div>
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data = </div>
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label: {389x1 cell}</div>
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trial: {[389x9313200 double]}</div>
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time: {[1x9313200 double]}</div>
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fsample: 603.1072</div>
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cfg: [1x1 struct]</div>
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>> save continous.mat data -v7.3</div>
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<div class="">Then later, I used ft_databrowser() to view the data imported from the continuous.mat file and it says 15445 segments with time from 0 to 0.998164 seconds. I’m not sure what it means by segment but the time should be over 4 hours.</div>
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<div class=""><span class="Apple-tab-span" style="white-space:pre"></span>Do you know what I’m doing wrong?</div>
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<div class="">Mona</div>
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<div class="">On Oct 19, 2016, at 1:33 PM, Schoffelen, J.M. (Jan Mathijs) <<a href="mailto:jan.schoffelen@donders.ru.nl" class="">jan.schoffelen@donders.ru.nl</a>> wrote:</div>
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Hi Mona,
<div class="">I wonder why you would want this. Is the time across the different files continuous, i.e. does the end of one file fit directly onto the next?</div>
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<div class="">If so, but you really need to be sure about this, you can use the good old-fashioned cat command: trial{1} = cat(2,data.trial{:}); time{1} = cat(2,data.time{:});</div>
<div class="">data.trial = trial;data.time = time;</div>
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<div class="">Best,</div>
<div class="">Jan-Mathijs</div>
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************************************************<br class="">
Mona Wong<br class="">
Web & iPad Application Developer</div>
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San Diego Supercomputer Center<br class="">
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