Discrete Wavelet Transform Extension Mode
dwtmode() dwtmode('status') ST=dwtmode('status','nodisp') dwtmode(mode)
extension mode, 'symh'('sym'), 'symw', 'asymh', 'asymw', 'zpd', 'zpd', 'per', 'ppd'.
dwtmode is to display or change extension mode.
dwtmode; dwtmode('zpd');