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<font size="4" class="">Hi Jo,</font>
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<div class=""><font size="4" class="">The size of the variable that you are using as an input is quite large, probably it takes up 20GB of RAM or so.</font></div>
<div class=""><font size="4" class="">Perhaps that the low-level c-code, on which the nanmean mex-files are based, has problems dealing with such large variables? Although I would have expected an error to be thrown or a segmentation fault in that case. Does
mr. Google provide any directions here (e.g. when searching for the maximum allowed variable size in mex files)? </font></div>
<div class=""><font size="4" class="">As a side note, I am surprised that the code defaults to using the mex-file, while you seem to have the legacy nanmean function available.</font></div>
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<div class=""><font size="4" class="">Best wishes,</font></div>
<div class=""><font size="4" class="">Jan-Mathijs</font></div>
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<div class="">On 6 May 2020, at 12:27, <a href="mailto:joachim.lange@med.uni-duesseldorf.de" class="">
joachim.lange@med.uni-duesseldorf.de</a> wrote:</div>
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<div style="margin-top: 0px; margin-bottom: 0px;" class="">Dear all,</div>
<div style="margin-top: 0px; margin-bottom: 0px;" class="">I have a dataset with 94 trials, 44800 (virtual) channels, and 600 timepoints. I applied ft_timelockanalysis on this dataset and the output was surprisingly "0" for all channel-time pairs, even for
those channels that contained only NaNs (because they were outside the brain). If I tried a smaller number of trials, everything was fine, though (i.e., no zeros, but plausible values).<span class="Apple-converted-space"> </span><br class="">
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<div style="margin-top: 0px; margin-bottom: 0px;" class="">I was able to boil down the problem to the function "nanmean". If I extract a 94x44800x600 matrix from the dataset and use FT's nanmean (apparently fieldtrip-20200423/external/stats/nanmean.mexa64),
the result is zeros, again. If I use matlab's nanmean, everythig seems fine.</div>
<div style="margin-top: 0px; margin-bottom: 0px;" class="">Any help is appreciated.</div>
<div style="margin-top: 0px; margin-bottom: 0px;" class="">Best,</div>
<div style="margin-top: 0px; margin-bottom: 0px;" class="">Jo<br class="">
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<span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">_______________________________________________</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">
<span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">fieldtrip
mailing list</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">
<a href="https://mailman.science.ru.nl/mailman/listinfo/fieldtrip" style="font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">https://mailman.science.ru.nl/mailman/listinfo/fieldtrip</a><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">
<a href="https://doi.org/10.1371/journal.pcbi.1002202" style="font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">https://doi.org/10.1371/journal.pcbi.1002202</a></div>
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