On 30. jun. 2014 15.02.14 CEST, Alois Schloegl <address@hidden> wrote:
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On 06/29/2014 12:13 AM, Helios de Rosario wrote:
Hi,
I'm interested in multiresolution analysis with wavelets in Octave. My
starting point is some routines that use functions from Matlab's Wavelet
Toolbox, so things would be easier if there were some package for Octave
that defines them.
However, I'm not sure what is the current situation in relation to this
topic. I have read recommendations to using WaveLab, or the package
ltfat, that implement a wide array of functions to work with wavelets.
That might be ok for my purposes, although the transition from Matlab
would not be that straightforward.
I have failed to understand if the Octave community generally sees such
packages
as
something like a "definitive" alternative to Matlab's
wavelet toolbox, or it is just that a more "clonic" alternative is still
not available, and in the meanwhile they are the best/more convenient
tools to work with.
I've been using this wavelet toolbox:
http://paos.colorado.edu/research/wavelets/
http://paos.colorado.edu/research/wavelets/software.html
which works on both, Matlab and Octave.
I can not speak for the whole octave community, but can provide a
personal opinion on that.
Given the fact that there are a number of
wavelet toolboxes for Matlab/Octave around, it should be ok, if one or
the other of these toolboxes are used. And Mathworks was certainly not
the first coming up with a wavelet-tb.
However, it's important that th
e same
toolbox can be used on both,
Matlab and Octave, without the need for modification. Using
Octave-specific syntax that is not supported by Matlab is detrimental to
that. The proliferation of different wavelet toolboxes would just continue.
- -- Alois
I guess it may be the latter case, since the signal package contains
the functions "dwt", "idwt" with identical definition as the ones of
Matlab's package, although they are not still fully functional, since
the function "wfilters" called by them is missing, at least until Octave
3.8. I'm also aware of the project for a wavelet package here, with
"wfilters" and other functions:
http://sourceforge.net/p/octave/wavelet/ci/default/tree/
but it's n
ot
still published in Octave Forge.
All in all, I would like to know what is the situation regarding this.
Depending on the skills and background needed to complete that work, I
would be willing to contribute to it, if there is work to be assigned.
If this question is already solved elsewhere, or should be moved to
octave-maintainers or wherever, please tell me.
Best regards
Helios De Rosario
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