search for: daubechies

> wt.filter("d8") #### HOW COME ???? Error in validObject(.Object) : invalid class "wt.filter" object: invalid object for slot "transform" in class "wt.filter": got class "function", should be or extend class "character" > wt.filter("d10") # OK An object of

Hello, I have to make use of the Cohen-Daubechies-Fauraue (CDF) 9/7 wavelet-transform, but have not found these biorthogonal wavlet in the released packages waveslim, wavethresh or wavelets. Is there any package doing this transform? Or can anybody send me the function doing this? I would be very grateful of that. Thanks Annika

Is there a wavelet toolbox in R available that can be compared to the Matlab toolbox for wavelets. Does this toolbox offer the possibility to calculated approximations with different wavelets such as Daubechies 2, Daubechies 3, etc, Symmlet 3, Symmlets 5, etc, Coiflets and so on. I have tried to proceed in this way but I was only able to use one sort of wavelets with a pre-fixed order (i.e. pre-fixed vanishing moments). Thank you for help! Vera Hofer

Dear R Users, For running wavelet functions using dwt( ), modwt( ), and mra( ), a wavelet filter algorithm is applied. For all these functions, default is "la8" and other possibility is "haar". In related documents, another possibilities like as symlet and coiflet ... are not cited. Besides "la8" and "haar", which wavelet filters can be used? Thank

...t.filter) for acceptable filter names wt.filter(filter="la8", modwt=FALSE) Arguments filter A character string indicating which wavelet transform filter to compute .... Details The character strings currently supported are derived from one of four classes of wavelet transform filters: Daubechies, Least Asymetric, Best Localized and Coiflet. The prefixes for filters of these classes are d, la, bl and c, respectively. Following the prefix, the filter name consists of an integer indicating length. Supported lengths are as follows: Daubechies 2,4,6,8,10,12,14,16,18,20. Least Asymetric 8,10,...

...rect one? Oh, and another question I just remembered: audio signals are signed, because they're representations of the movement of the microphone. Video data does not have that, but the wavelet transform does expect signed data (or doesn't it? Haar works on unsigned data but what about Daubechies and other wavelets?). So how do I convert? Simply subtracting 128 from each sample (ie casting to signed int) seems wrong. Hope I didn't steal too much time from your efforts of getting it to work on Solaris :) Cheers, Lourens --- >8 ---- List archives: http://www.xiph.org/archives/...

...g wavelet order from minimum enthropy of squared wavelet 1 Error: Unclassifiable statement at (1) ford.f90:4: c --- coefficients distribution on detail levels with numbers from LevMin up to 1 Error: Unclassifiable statement at (1) ford.f90:5: c --- Vocabulary of wavelets: the first 10 orthogonal Daubechies wavelets + 7 1 Error: Unclassifiable statement at (1) ford.f90:6: c --- If wavelet order is p>100 it means that it is a symlet of the order (p-10 1 Error: Unclassifiable statement at (1) ford.f90:7: c --- Input: X - real array of signal of the length N; 1 Error: Unclassifiable statement at (1...

...uot;) Error in validObject(.Object) : invalid class "wt.filter" object: invalid object for slot "transform" in class "wt.filter": got class "function", should be or extend class "character" How come ? The above function works fine with the other Daubechies filters. Thank you. Best regards, Maura tutti i telefonini TIM! [[alternative HTML version deleted]]

For all the curious: http://www.vorbis.com/~jack/tarkin-experimental.tar.gz ome instructions: tar xzvf tarkin-experimental.tar.gz cd tarkin make ./tarkin 95 ./tarkinplayer output.tark You'll need SDL and SDL-devel if you don't already have them. jack. --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this

For all the curious: http://www.vorbis.com/~jack/tarkin-experimental.tar.gz ome instructions: tar xzvf tarkin-experimental.tar.gz cd tarkin make ./tarkin 95 ./tarkinplayer output.tark You'll need SDL and SDL-devel if you don't already have them. jack. --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this

...387-98280-9. Papers available on the web: A nice introduction to wavelets is http://cm.bell-labs.com/who/wim/papers/athome/ A somewhat theoretical paper about integer wavelet transform http://cm.bell-labs.com/who/wim/papers/integer.ps.gz Since Peter Schroeder, Denis Zorin, Wim Weldens and Ingrid Daubechies are currently the most active researchers on wavelets, you might want to check out some of their papers: http://cm.bell-labs.com/who/wim/papers/ http://www.princeton.edu/~icd/publications/ http://www.cs.caltech.edu/~ps/ A lot of links to data compression sites are on http://www.internz.com/compres...

Hi R users   Thanks in advance   Is lifting wavelet transform implemented in R? If so, which package or codes  can be used for performing that?    assaedi76@yahoo.com   Thanks     [[alternative HTML version deleted]]