I am also interested in this. Were you able to figure this out? I am trying to use the WV_CWT with the haar function but even with the documentation I am not able to call it correctly.

I think you call WV_FN_HARR with the desired order and then you use the results with the WV_DWT function. For example:

res = wv_fn_haar(1,scaling,wavelet,ioff,joff)
d = dist(64)
part_wv = wv_dwt(d, wavelet,scaling,ioff,joff, N_LEVELS=3)

Just another note ....

The issue is that the Haar wavelet family is of type discrete. WV_CWT is for continuous wavelets only. You will want to use WV_DWT for discrete.

You need to run WV_FN_HAAR separately first to create your coefficients based on the order you define.
Then you input all that information into WV_DWT to create wavelet transform. David's code example is what you need, OP


Does this make sense? For continuous families, you can use WV_CWT directly. For discrete families, you must wave the WV_FN_FAMILYNAME function first, then WV_DWT.

============

Hope this helps.

P.S. I will look into making this more clear in the IDL Documentation Center.


Ben Castellani
IDL Team
Harris Geospatial Solutions

It appears the WV functions that will not work with WV_CWT are (most likely because of the reasons Ben C. stated in his post):

WV_FN_COIFLET
WV_FN_DAUBECHIES
WV_FN_HAAR
WV_FN_SYMLET

-David S.

I am also interested in this. Using the code above you get an array of the same size as the input , not like with a wv_cwt where you get a complex array with variations in time and also scale. How can I use the haar wavelet to get a scaleogram as you get easily with wv_cwt?