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<p>Dear all, <br>
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<p>I am new to fieldtrip so I apologize in advance if my question is trivial.<br>
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<p>I am trying to run a time frequency analysis with Morlet wavelets. </p>
<p>Here is the code I am using:<br>
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<div>cfg = [];</div>
<div>cfg.channel = 1:64;<span style="white-space:pre"> </span> <br>
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<div>cfg.method = 'wavelet'; </div>
<div><span style="font-size: 12pt;">cfg.pad = 10;</span><br>
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<div><span style="font-size: 12pt;">cfg.width = 7; </span><br>
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<div>cfg.output = 'pow';<span style="white-space:pre"> </span></div>
<div>cfg.foi = 4:1:30;<span style="white-space:pre"> </span> </div>
<div>cfg.toi = 0:0.0039:2;<span style="white-space:pre"> </span> % my sampling rate is 512 Hz </div>
<div>TFRwave = ft_freqanalysis(cfg, data_clean);<br>
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<div><br>
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<div>Where data_clean is the struct containing my trials. <span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);">All my trials are the same length.</span><br>
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<div>When I run this code, I get the following warning:<br>
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<div>Warning: output time-bins are different from input time-bins </div>
<div>trial 1, frequency 26 (29.00 Hz)</div>
<div>Warning: output time-bins aretrial 2, frequency 25 (28.00 Hz)<br>
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<div>Warning: output time-bins aretrial 3, frequency 24 (27.00 Hz)</div>
<div>Warning: output time-bins aretrial 4, frequency 25 (28.00 Hz)<br>
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<div>Warning: output time-bins aretrial 5, frequency 23 (26.00 Hz)<br>
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<div>[...]<br>
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<div>I have no idea what this means. Any suggestion?<br>
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<div>Despite the warning, the TRFwave is computed, but when I try to plot it I get a completely blue output. Here is the code I am using for the plot:<br>
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<div>cfg = [];</div>
<div>cfg.baseline = [-0.5 -0.1]; </div>
<div>cfg.baselinetype = 'absolute'; <span style="white-space:pre"></span> </div>
<div>cfg.zlim = [-3e-27 3e-27];<br>
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<div>cfg.showlabels = 'yes';<span style="white-space:pre"> </span> </div>
<div>cfg.layout = 'biosemi64.lay';</div>
<div>figure</div>
<div>ft_multiplotTFR(cfg, TFRwave)<br>
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<div><br>
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<div>When I check the content of my TFRwave I can see it is not made of NaNs. </div>
<div>Is the problem due to the setting cfg.zlim? It is not clear to me how to set it.<br>
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<div>Thanks in advance for any help!<br>
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<div><br>
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<div>Silvia<br>
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