search for: idwt

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2011 May 19
1
IDWT - Inverse Discrete Wavelet Transform
...pace to the related coordinate in the 3d original dataset? (i think that probably one (x,y,z point in the 3d transformed space will be related probably with 8 vowels in the orginal one...)) Thanks in advance for the help Massimiliano -- View this message in context: http://r.789695.n4.nabble.com/IDWT-Inverse-Discrete-Wavelet-Transform-tp3535334p3535334.html Sent from the R devel mailing list archive at Nabble.com.
2005 Nov 04
1
problem in waveslim library?
This code consistenly segfaults for me. Can someone please take a look and tell me if the problem is due to something I am doing or is there a problems with the dwt (idwt) functions in the waveslim library. Thanks tom library(waveslim) data<-c(936.944,936.944,936.944,936.944,936.944,936.944,936.944,936.944,936.944,936.944,936.944,936.944,936.944,916.994666666667,909.592,941.8,961.933333333333,987.8,969.2,934.866666666667,912.8,913.266666666667,928.2,949.533333...
1999 Nov 19
2
Impulses
...his path before: Roughtly vorbis currently does: input wave -> MDCT -> LPC -> LSP -> quant -> ------------------>output \->delpc->error->quant -^ What do you think of this: input wav -> DWT -> sum non-impuse factors -> iDWT -> MDCT ... (like above) \ -> -> sum impulse factors -> iDWT -> LPC -> LSP -> quant i.e. use a wavelet transform to seperate out impulsey signals and compress them in the time domain. The decoder complexity really isn't increased much (just o...
2010 Aug 04
1
wavlet transform
Hello I do wavelet transform by using this code: dec=dwt(ld, filter='d8', n.levels=lev, boundary="reflaction"); dec consists of the decomposition coefficients and other How can I change the coefficients the decomposition manualy? -- View this message in context: http://r.789695.n4.nabble.com/wavlet-transform-tp2313427p2313427.html Sent from the R help mailing list archive at
2009 Feb 24
0
Wavelet Bootstrap Size Simulation
...nal series wavestrap <- function (y, wf = "d8", J = log(length(y), 2) - 1, infl = sqrt(1.1)){ y.dwt <- dwt(y, wf, n.levels = J) resample.dwt <- y.dwt for (i in 1:(length(y.dwt)-1)) { resample.dwt[[i]] <- sample(y.dwt[[i]]*infl, replace = TRUE) } idwt(resample.dwt) } #The simulation: arcoeff<-.9 #AR(1) Coefficient T<-128 #Realization Length bsreps<-300 #Number of Bootstrap Replicates used for test nosims<-20 #Number of Simulations wspval<-rep(0,nosims) #initialize vector of p-values #outer loop for recording calculated p-values...
2006 Jan 14
2
initialize expression in 'quasi' (PR#8486)
This is not so much a bug as an infelicity in the code that can easily be fixed. The initialize expression in the quasi family function is, (uniformly for all links and all variance functions): initialize <- expression({ n <- rep.int(1, nobs) mustart <- y + 0.1 * (y == 0) }) This is inappropriate (and often fails) for variance function "mu(1-mu)".