> From: jdnew...@dcn.davis.ca.us > Date: Mon, 4 Jul 2011 00:45:41 -0700 > To: tyagi...@gmail.com; r-help@r-project.org > Subject: Re: [R] wavelets > > Study the topic more carefully, I suppose. My understanding is that wavelets > do not in themselves compress anything, but because they sort out the > interesting data from the uninteresting data, it can be easy to toss the > uninteresting data (lossy data compression). Perhaps you should understand > better what your Matlab library is doing. > --------------------------------------------------------------------------- > Jeff Newmiller The ..... ..... Go Live... > DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go... > Live: OO#.. Dead: OO#.. Playing > Research Engineer (Solar/Batteries O.O#. #.O#. with > /Software/Embedded Controllers) .OO#. .OO#. rocks...1k > --------------------------------------------------------------------------- > Sent from my phone. Please excuse my brevity. > > user123 <tyagi...@gmail.com> wrote: > > I'm new to the topic of wavelets. When I tried to use the mra function in the > wavelets package, the data is not getting compressed. eg. if the original > data has 500 values , the output data also has the same. > However in MATLAB, depending on the level of decompositon, the data gets > compressed. > How do I implement this in R?
can you post some code? You can always compress into one value of course by turning bytes into a single char string, what you want is entropy. I posted some example code before and I remember it took effort to not get the subsampling. mra is probably multi-resolution analysis and I'd suppose you want all the samples. You probably need paper and pencil however at this point. > > -- > View this message in context: > http://r.789695.n4.nabble.com/wavelets-tp3642973p3642973.html > Sent from the R help mailing list archive at Nabble.com. > > _____________________________________________ > > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
