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<p style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">Dear FieldTrip community,</p>
<p style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><br>
</p>
<p style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">I have a question regarding time-frequency analyses, it would be awesome if someone could help me out!</p>
<p style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><br>
</p>
<p style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">Does anyone perhaps know what the absolute units are of the TFRwave.powerspctrm <span style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols;">that
you get when </span>performing a continuous wavelet transform:<br>
</p>
<p style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><br>
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<p style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"></p>
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cfg = [];</div>
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cfg.channel = 'Cz';<span style="white-space: pre;"> </span> </div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">
cfg.method = 'tfr'; </div>
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cfg.width = 7; </div>
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cfg.output = 'pow';<span style="white-space: pre;"> </span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">
cfg.foi = 1:0.25:30;<span style="white-space: pre;"> </span> </div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">
cfg.toi = -3:0.01:2.5;<span style="white-space: pre;"> </span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">
<span style="font-size: 12pt;">TFRwave = ft_freqanalysis(cfg, trialdata);</span><br>
</div>
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<span style="font-size: 12pt;"><br>
</span></div>
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<span style="font-size: 12pt;">
<div>cfg = [];</div>
<div>cfg.channel = 'Cz';</div>
<div>cfg.baseline = [-0.5 -0.1]; </div>
<div>cfg.baselinetype = 'absolute'; </div>
<div><span style="font-size: 12pt;">cfg.zlim = 'maxabs';</span><br>
</div>
<div>cfg.xlim = [-0.2 1.5];</div>
<div>cfg.showlabels = 'yes';<span style="white-space: pre;"> </span> </div>
<div>figure</div>
<div>ft_singleplotTFR(cfg, TFRwave)</div>
<br>
</span></div>
<p style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"></p>
<p style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">The single plot shows reliable results compared to the Hanning window method, however the values of the powerspectrum are in the hundred thousands (?) - see image attached.</p>
<p style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">This can't be uV^2/Hz, perhaps nV^2/Hz?</p>
<p style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><br>
</p>
<p style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">Thanks in advance!</p>
<p style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><br>
</p>
<p style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">Alex</p>
<br>
<p></p>
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</font><font style="font-family:Verdana;font-size:12pt;font-weight:bold;">Alexander Mentink</font> <br>
<font face="Verdana">Centre for Human Drug Research<br>
Zernikedreef 8<br>
2333 CL Leiden<br>
The Netherlands</font><font style="font-family:Verdana;font-size:12pt;"><br>
T +31 (0) 71 7517166</font><br>
<font style="font-family:Verdana;font-size:12pt;">amentink@chdr.nl</font><br>
<font face="Verdana">http://www.chdr.nl<br>
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