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Dear Varghese,
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<div class="">In general, I think that workarounds should be avoided as much as possible, unless one wants to achieve something very exotic.</div>
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<div class="">In your case, it seems that the required functionality is something that more people might benefit from, in which case a generic/principled solution would be in order.</div>
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<div class="">This would mean that xdf2fieldtrip should be made smarter so that it also returns the events. The ’streams’ are read in using the lower level load_xdf function (located in external/xdf), but at the moment only the continuous data is returned.
What you need to do is to write some code that can extract event information from the discontinuous stream (ideally in a fieldtrip compatible event-structure), and pass this as an output to the function.</div>
<div class="">Once the code is up and running, we’d be happy to receive a pull request on github, so that other users can benefit from this functionality!</div>
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<div class="">Thanks and happy computing.</div>
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<div class="">Jan-Mathijs</div>
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<div class="">On 27 Aug 2019, at 08:54, Varghese Peter <<a href="mailto:V.Peter@westernsydney.edu.au" class="">V.Peter@westernsydney.edu.au</a>> wrote:</div>
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<span style="" class="">Dear fieldtrip community,<o:p class=""></o:p></span></div>
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<span style="" class=""> <o:p class=""></o:p></span></div>
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<span style="" class="">I am working with EEG files in the xdf format recorded using the Lab Recorder program. I used the ‘xdf2fieldtrip function to import the data in the fieldtrip format. I got the output as follows:<o:p class=""></o:p></span></div>
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<span style="" class=""> <o:p class=""></o:p></span></div>
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<span style="font-family: "Courier New";" class="">stream 1 contains continuous LiveAmpSN-054208-0189 data</span><span style="" class=""><o:p class=""></o:p></span></div>
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<span style="font-family: "Courier New";" class="">stream 2 contains non-continuous Presentation data</span><span style="" class=""><o:p class=""></o:p></span></div>
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<span style="font-family: "Courier New";" class=""> </span><span style="" class=""><o:p class=""></o:p></span></div>
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<span style="font-family: "Courier New";" class="">data = </span><span style="" class=""><o:p class=""></o:p></span></div>
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<span style="font-family: "Courier New";" class=""> </span><span style="" class=""><o:p class=""></o:p></span></div>
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<span style="font-family: "Courier New";" class=""> struct with fields:</span><span style="" class=""><o:p class=""></o:p></span></div>
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<span style="font-family: "Courier New";" class=""> </span><span style="" class=""><o:p class=""></o:p></span></div>
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<span style="font-family: "Courier New";" class=""> hdr: [1×1 struct]</span><span style="" class=""><o:p class=""></o:p></span></div>
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<span style="font-family: "Courier New";" class=""> label: {32×1 cell}</span><span style="" class=""><o:p class=""></o:p></span></div>
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<span style="font-family: "Courier New";" class=""> time: {[1×545430 double]}</span><span style="" class=""><o:p class=""></o:p></span></div>
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<span style="font-family: "Courier New";" class=""> trial: {[32×545430 single]}</span><span style="" class=""><o:p class=""></o:p></span></div>
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<span style="" class=""> <o:p class=""></o:p></span></div>
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<span style="" class="">I want to use the Presentation stream (events) to epoch the data. Since ‘ft_definetrial’ require data in the original format and the xdf format is not supported in the ‘ft_preprocessing’, is there a workaround?<o:p class=""></o:p></span></div>
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<span style="" class=""> <o:p class=""></o:p></span></div>
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<span style="" class="">Thanks,<o:p class=""></o:p></span></div>
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<span style="" class="">Varghese Peter<o:p class=""></o:p></span></div>
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<o:p class=""> </o:p></div>
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<a href="https://doi.org/10.1371/journal.pcbi.1002202" style="color: rgb(149, 79, 114); text-decoration: underline; 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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