function?[tfrtf]?=?tfrwv（xtNtrace）
%??WVD

%TFRWV	Wigner-Ville?time-frequency?distribution.
%	[TFRTF]=TFRWV（XTNTRACE）?computes?the?Wigner-Ville?distribution
%	of?a?discrete-time?signal?X?
%	or?the?cross?Wigner-Ville?representation?between?two?signals.?
%?
%	X?????:?signal?if?auto-WV?or?[X1X2]?if?cross-WV.
%	T?????:?time?instant（s）??????????（default?:?1:length（X））.
%	N?????:?number?of?frequency?bins?（default?:?length（X））.
%	TRACE?:?if?nonzero?the?progression?of?the?algorithm?is?shown
%	?????????????????????????????????（default?:?0）.
%	TFR???:?time-frequency?representation.?When?called?without?
%	????????output?arguments?TFRWV?runs?TFRQVIEW.
%	F?????:?vector?of?normalized?frequencies.
%
%	Example?:
%	?sig=fmlin（1280.10.4）;?tfrwv（sig）;
%?
%	See?also?all?the?time-frequency?rep