Support for Function wave.filter().

USAGE:

bspline.filter(wavelet, high.pass=F, dual.filter=F, even.filter=F) 
coiflet.filter(wavelet, high.pass=F) 
daublet.filter(wavelet, high.pass=F) 
symmlet.filter(wavelet, high.pass=F) 
vspline.filter(wavelet, high.pass=F, dual.filter=F, even.filter=F) 

These are support for the function wave.filter(). They are not indended to be called directly by users.