<div dir="ltr"><div>Dear Fieldtrip community,<div><br></div><div>I have an TMS-EEG dataset, epoched from -1 to 1 second, with the trigger being the TMS pulse. Due to the TMS pulse artifact, data from -5 ms to 10 ms is trimmed (removed and replaced with NaNs).</div><div><br></div><div>After importing the preprocessed data from eeglab using eeglab2fieldtrip(EEG, 'preprocessing'), I tried running a multitaper TFR analysis, with the code below being what I have used: </div><div><br></div><div><p class="gmail-p1" style="font-size:10px;margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal;font-family:Courier">dataSPfreq<span class="gmail-Apple-converted-space">              </span>= eeglab2fieldtrip(EEG, <span class="gmail-s1" style="color:rgb(178,69,243)">'preprocessing'</span>);</p><p class="gmail-p1" style="font-size:10px;margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal;font-family:Courier">cfg = [];</p><p class="gmail-p1" style="font-size:10px;margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal;font-family:Courier">cfg.output <span class="gmail-Apple-converted-space">    </span>= <span class="gmail-s1" style="color:rgb(178,69,243)">'pow'</span>;</p><p class="gmail-p1" style="font-size:10px;margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal;font-family:Courier">cfg.method <span class="gmail-Apple-converted-space">    </span>= <span class="gmail-s1" style="color:rgb(178,69,243)">'mtmconvol'</span>;</p><p class="gmail-p1" style="font-size:10px;margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal;font-family:Courier">cfg.foi<span class="gmail-Apple-converted-space">        </span>= 4:2:30;</p><p class="gmail-p1" style="font-size:10px;margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal;font-family:Courier">cfg.t_ftimwin<span class="gmail-Apple-converted-space">  </span>= 2 ./ cfg.foi;</p><p class="gmail-p1" style="font-size:10px;margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal;font-family:Courier">cfg.tapsmofrq<span class="gmail-Apple-converted-space">  </span>= 0.4 *cfg.foi;</p><p class="gmail-p1" style="font-size:10px;margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal;font-family:Courier">cfg.toi<span class="gmail-Apple-converted-space">        </span>= -0.1:0.01:0.5;</p><p class="gmail-p3" style="font-size:10px;margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal;font-family:Courier;color:rgb(37,153,45);min-height:12px"><span class="gmail-Apple-converted-space"> </span></p><p class="gmail-p1" style="font-size:10px;margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal;font-family:Courier">dataSPfreq = ft_freqanalysis(cfg, dataSPfreq)</p><p class="gmail-p1" style="font-size:10px;margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal;font-family:Courier"><span class="gmail-Apple-converted-space"><br></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal"><span class="gmail-Apple-converted-space"><font face="arial, helvetica, sans-serif" size="2">The output then is filled with NaNs.</font></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal"><span class="gmail-Apple-converted-space"><font face="arial, helvetica, sans-serif" size="2"><br></font></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal"><span class="gmail-Apple-converted-space"><font face="arial, helvetica, sans-serif" size="2">I'm assuming it has something to do with the NaNs in the dataset, but then when trying to select TOIs that shouldn't be affected by the NaN's, such as: </font></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal"><span style="font-family:Courier;font-size:10px"><br></span></p><p class="gmail-p1" style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:10px;line-height:normal;font-family:Courier;margin:0px">dataSPfreq<span class="gmail-Apple-converted-space">              </span>= eeglab2fieldtrip(EEG, <span class="gmail-s1" style="color:rgb(178,69,243)">'preprocessing'</span>);</p><p class="gmail-p1" style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:10px;line-height:normal;font-family:Courier;margin:0px">cfg = [];</p><p class="gmail-p1" style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:10px;line-height:normal;font-family:Courier;margin:0px">cfg.output <span class="gmail-Apple-converted-space">    </span>= <span class="gmail-s1" style="color:rgb(178,69,243)">'pow'</span>;</p><p class="gmail-p1" style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:10px;line-height:normal;font-family:Courier;margin:0px">cfg.method <span class="gmail-Apple-converted-space">    </span>= <span class="gmail-s1" style="color:rgb(178,69,243)">'mtmconvol'</span>;</p><p class="gmail-p1" style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:10px;line-height:normal;font-family:Courier;margin:0px">cfg.foi<span class="gmail-Apple-converted-space">        </span>= 4:2:30;</p><p class="gmail-p1" style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:10px;line-height:normal;font-family:Courier;margin:0px">cfg.t_ftimwin<span class="gmail-Apple-converted-space">  </span>= 2 ./ cfg.foi;</p><p class="gmail-p1" style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:10px;line-height:normal;font-family:Courier;margin:0px">cfg.tapsmofrq<span class="gmail-Apple-converted-space">  </span>= 0.4 *cfg.foi;</p><p class="gmail-p1" style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:10px;line-height:normal;font-family:Courier;margin:0px">cfg.toi<span class="gmail-Apple-converted-space">        </span>= 0.1:0.01:0.6;</p><p class="gmail-p3" style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:10px;line-height:normal;font-family:Courier;margin:0px;color:rgb(37,153,45);min-height:12px"><span class="gmail-Apple-converted-space"> </span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal"></p><p class="gmail-p1" style="font-size:10px;margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal;font-family:Courier">dataSPfreq = ft_freqanalysis(cfg, dataSPfreq)<span class="gmail-Apple-converted-space"> </span></p><p class="gmail-p1" style="font-size:10px;margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal;font-family:Courier"><span class="gmail-Apple-converted-space"><br></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal"><span class="gmail-Apple-converted-space"><font face="arial, helvetica, sans-serif" size="2">with toi adjusted (which I believe should contain the appropriate time window size for the lowest frequency at 0.5 s) I still end up with NaNs.</font></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal"><span class="gmail-Apple-converted-space"><font face="arial, helvetica, sans-serif" size="2"><br></font></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal"><span class="gmail-Apple-converted-space"><font face="arial, helvetica, sans-serif" size="2">Sorry if there is an obvious mistake that I am missing. Any help with this would be greatly appreciated. </font></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal"><span class="gmail-Apple-converted-space"><font face="arial, helvetica, sans-serif" size="2"><br></font></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal"><span class="gmail-Apple-converted-space"><font face="arial, helvetica, sans-serif" size="2">Best,</font></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal"><span class="gmail-Apple-converted-space"><font face="arial, helvetica, sans-serif" size="2">Paul</font></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal"><span class="gmail-Apple-converted-space"><font face="arial, helvetica, sans-serif" size="2"><br></font></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal"><span class="gmail-Apple-converted-space"><font face="arial, helvetica, sans-serif" size="2"><br></font></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal"><span class="gmail-Apple-converted-space"><font face="Courier" style="font-size:10px"><br></font></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal"><span class="gmail-Apple-converted-space"><font face="Courier" style="font-size:10px"> </font></span></p></div></div></div>