function?[ft]=enframe（xwininc）
?%ENframe?split?signal?up?into?（overlapping）?frames:?one?per?row.?[FT]=（XWININC）
?%
?%????F?=?ENframe（XLEN）?splits?the?vector?X（:）?up?into
?%????frames.?Each?frame?is?of?length?LEN?and?occupies
?%????one?row?of?the?output?matrix.?The?last?few?frames?of?X
?%????will?be?ignored?if?its?length?is?not?divisible?by?LEN.
?%????It?is?an?error?if?X?is?shorter?than?LEN.
?%
?%????F?=?ENframe（XLENINC）?has?frames?beginning?at?increments?of?INC
?%????The?centre?of?frame?I?is?X（（I-1）*INC+（LEN+1）/2）?for?I=12...
?%????The?number?of?frames?is?fix（（length（X）-LEN+INC）/INC）
?%
?%????F?=?ENframe（XWINDOW）?or?ENframe（XWINDOWINC）?multiplies
?%????each?frame?by?WINDOW（:）
?%
?%???The?second?output?argument?T?gives?the?time?in?samples?at?the?centre
?%???of?each?frame.?T=i?corresponds?to?the?time?of?sample?X（i）.
?%
?%?Example?of?frame-based?processing:
?%??????????INC=20???????????????????????????????????????????????????????????%?set?frame?incremen