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<th align="right" nowrap="nowrap" valign="baseline">Subject: </th>
<td>freqanalysis_wltconvol.m wavelets</td>
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<th align="right" nowrap="nowrap" valign="baseline">Date: </th>
<td>Thu, 22 May 2008 12:47:11 -0700</td>
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<th align="right" nowrap="nowrap" valign="baseline">From: </th>
<td>Brian Roach <a class="moz-txt-link-rfc2396E" href="mailto:brian.roach@ncire.org"><brian.roach@ncire.org></a></td>
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<th align="right" nowrap="nowrap" valign="baseline">To: </th>
<td>FieldTrip discussion list <a class="moz-txt-link-rfc2396E" href="mailto:FIELDTRIP@NIC.SURFNET.NL"><FIELDTRIP@NIC.SURFNET.NL></a></td>
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<font size="-1"><font face="Helvetica, Arial, sans-serif">Hi All,<br>
<br>
Attached is a plot with 6 iterations of freqanalysis_wltconvol.m run
(40Hz wavelet plotted). From top to bottom, these plots show<br>
</font></font><font size="-1"><font face="Helvetica, Arial, sans-serif"><br>
1. cfg.width = 7, cfg.gwidth = 1</font></font><font size="-1"><font
face="Helvetica, Arial, sans-serif"><br>
2. cfg.width = 7, cfg.gwidth = 2</font></font><font size="-1"><font
face="Helvetica, Arial, sans-serif"><br>
3. cfg.width = 7, cfg.gwidth = 3</font></font><font size="-1"><font
face="Helvetica, Arial, sans-serif"><br>
4. cfg.width = 14, cfg.gwidth = 4</font></font><font size="-1"><font
face="Helvetica, Arial, sans-serif"><br>
5. cfg.width = 14, cfg.gwidth = 5</font></font><font size="-1"><font
face="Helvetica, Arial, sans-serif"><br>
6. cfg.width = 14, cfg.gwidth = 6<br>
<br>
My question is regarding the peaks of the windowed wavelets - why are
they offset from one another? I would think that the peak latencies
should not shift, only the number of cycles or the length of the gauss
should change with the cfg manipulations above.<br>
<br>
In addition to that question, I have attached a screen shot from the
matlab help on the topic of complex morlet wavelets. There, it looks
like the real part should have its peak at the 0 point or middle of the
gauss, which does not appear to be the case in any of my 6 examples.
Is this peak at 0ms a necessary feature or a morlet wavelet, or is it
always plotted this way as a convention, not as a rule?<br>
<br>
thank you,<br>
Brian<br>
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