wpts(a,b,f) Returns the symmetric
wavelet packet transform of the array a
with respect to basis or level b
by the wavelet filter f.
iwpts(w,b,f) Returns the inverse
symmetric wavelet packet transform of the array w
with respect to basis b by the
wavelet filter f.
Arguments:
a is a vector
or matrix. The length of a must
be greater than or equal to 2level
if a is a vector. The number of
rows and columns of a must both
be greater than or equal to 2level
if a is a matrix.
b represents
a level or a packet basis. For wpts,
b is an integer or a 2- or 3-column
matrix representing a packet basis. For iwpts, b must be a 2- or 3-column matrix representing a packet basis.
f is either a
vector or a 2-column matrix, usually resulting from bl, Bspline or daublet(2).