<div dir="ltr"><div>Hi Dennis:</div><div><br></div><div>Thanks very much!</div><div><br></div><div>I am now trying to figure out how to set the parameters and interpret my calculation.</div><div><br></div><div>Suppose that I have 1-d spatial data (size:300) with regular 100 m interval. Using the example wavelet_1.ncl, I set N = 300 and the other parameters unchanged. After the calculation, can I take the Y-axis of power({0:64}, :) as wavelength (unit: 100 m), instead of periods?</div><div><br></div><div>Thanks!</div><div><br></div><div>Ed</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Oct 30, 2015 at 11:45 AM, Dennis Shea <span dir="ltr"><<a href="mailto:shea@ucar.edu" target="_blank">shea@ucar.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Just like 'filwgts_lanczos' where examples are focused on time. NCL's<br>
wavelet function is focused on time. However, like 'filwgts_lanczos'<br>
it could be applied to space. In both applications the values must be<br>
equally spaced. (This may require interpolation.)<br>
<br>
As noted at<br>
<a href="http://www.ncl.ucar.edu/Document/Functions/Built-in/wavelet.shtml" target="_blank" rel="noreferrer">http://www.ncl.ucar.edu/Document/Functions/Built-in/wavelet.shtml</a><br>
<br>
NCL's wavelet function is a direct interface to the fortran software at:<br>
<br>
<a href="http://www.ncl.ucar.edu/Document/Functions/Built-in/wavelet.shtml" target="_blank" rel="noreferrer">http://www.ncl.ucar.edu/Document/Functions/Built-in/wavelet.shtml</a><br>
<br>
More details are at:<br>
<br>
Torrence, C. and G. P. Compo, 1998: A Practical Guide to Wavelet<br>
Analysis. Bull. Amer. Meteor. Soc., 79, 61-78.<br>
<br>
<a href="http://dx.doi.org/10.1175/1520-0477(1998)079" target="_blank" rel="noreferrer">http://dx.doi.org/10.1175/1520-0477(1998)079</a><0061:APGTWA><a href="http://2.0.CO" target="_blank" rel="noreferrer">2.0.CO</a>;2<br>
<br>
This will clarify the terminology used by the software.<br>
<br>
Good luck<br>
<div><div class="h5"><br>
On Thu, Oct 29, 2015 at 4:28 PM, yang yang <<a href="mailto:yang.yang816@gmail.com">yang.yang816@gmail.com</a>> wrote:<br>
> Dear Sir/Madam:<br>
><br>
> specx_anal: Calculates the spectra of a time series. Does NCL have a similar<br>
> function for a 1-D spatial series? For example, I have a radiosonde, would<br>
> like to see the variances vs. wavelength.<br>
><br>
> wavelet calculates the wavelet transform of a time series and significance<br>
> levels. Does NCL have a similar function for a 1-D spatial series? For<br>
> example, I have a radiosonde, would like to see the wavelet powers for<br>
> different wavelength at different heights.<br>
><br>
> Thanks very much!<br>
><br>
> Regards<br>
> Ed<br>
><br>
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