R help - May 1999 - Wavethresh + accessC > Error: wd.structure has no class

Hi,

Whenever I issue this commands (as in the help for the threshold
function),


        #
        # Do a 1D decomposition
        #
        tdecomp <- wd(test.data)
        #
        # Threshold it
        #
        tdecomp.thresh <- threshold(tdecomp)
        #
        # Reconstruct from the thresholded coefficients
        #
        trecons <- wr(tdecomp.thresh)
        #
        # Plot the reconstructed function
        #
        plot(accessC(trecons))

I receive the following reply:

Error: wd.structure has no class

Does anybody know what the problem is ?

Best,

Costas

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Konstantinos E. Vorloou           | Tel: +44 (0)191 374 1821
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On Thu, 20 May 1999, K.E.Vorloou wrote:
>         tdecomp <- wd(test.data)
>         tdecomp.thresh <- threshold(tdecomp)
>         trecons <- wr(tdecomp.thresh)
>         plot(accessC(trecons))
> 
> I receive the following reply:
> 
> Error: wd.structure has no class
> 
> Does anybody know what the problem is ?
trecons is a vector, but accessC returns the "smooth" coefficients of
some
wavelet decomposition. Therefore accessC(trecons) does not make sense.
If you want to plot the reconstructed function try simply 
> plot(trecons)
(maybe with an optional ty="l" argument to get straight lines)

If you want to extract the smooth coefficients at level j, try something
like
> tdecomp.Cj<-accessC(tdecomp.thresh,level=j)
Best

Arne

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