search for: imwd

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2005 Nov 23
1
assign() problem
...ode should be clean. My code: # Wavelet multiresolution decomposition wmra <- function(image_file){ #require(rimage) require(wavethresh) #reading image file and converting it to grayscale #dimage <- read.jpeg(image_file) #dimage <- imagematrix(dimage) # discrete wavelet decomposition imwdImage <- imwd(image_file) # get a value for the number of decomposition levels #nlevels <- imwdImage$nlevels i <- 0 varname <- paste("level",0:(imwdImage$nlevels-1),sep="") print(varname) while ( i < imwdImage$nlevels) { # set the threshold to 0 on all leve...
2012 May 29
1
Help needed in wavelet transforming
Hello I am currently working on forecasting hourly electricity prices where I am required to do wavelet transformation. First I need to calculate decomposition coefficients of the wavelet transform, then I need to select wavelet function using multiresolution technique. I would be really grateful if I can find any help in this matter. Thanking You with regards, -- Name : Tarun Trivedi Senior