accessC.wst {wavethresh} | R Documentation |
The smoothed data from a packet ordered non-decimated wavelet object (returned from wst
) are stored in a matrix. This function extracts all the coefficients corresponding to a particular resolution level.
accessC.wst(wst, level, aspect, ...)
wst |
Packet ordered non-decimated wavelet object from which you wish to extract the smoothed or original data (if the object is directly from a packet ordered non-decimated wavelet transform of some data). |
level |
The level that you wish to extract. This can range from zero (the coarsest coefficients) to nlevels(wstobj) which returns the original data. |
aspect |
|
... |
The wst
function performs a packet-ordered non-decimated wavelet transform. This function extracts all the father wavelet coefficients at a particular resolution level specified by level
.
Note that coefficients returned by this function are in emph{packet order}. They can be used as is but for many applications it might be more useful to deal with the coefficients in packets: see the function getpacket.wst
for further details.
A vector of the extracted data.
Nason, G. P. and Silverman, B. W. (1994). The discrete wavelet transform in S. Journal of Computational and Graphical Statistics, 3, 163–191.
wst
, wst.object
, accessC
, getpacket.wst
# # Get the 3rd level of smoothed data from a decomposition # #accessC(wst(data), level=3)