See first.last
to see what this kind of function does.
first.last.dh(LengthH, DataLength, type = "wavelet", bc = "periodic",
firstk = c(0, DataLength - 1))
wavelet
or station
for decimated and nondecimated transforms respectively.periodic
or symmetric
first.last
.dencvwd
,first.last
,wd.dh