function?y?=?confreg（muSna）
%CONFREG（muSna）?plots?an?95%?confidence?region?for?the?means?based?on?the
%approach?of?T-square?of?Hotelling?to?the?F?distribution?with?2n-2?df‘s
%in?the?2?dimensional?case.

p=2;
xbar=mu（11）;
ybar=mu（21）;
sigmax=S（11）;
sigmay=S（22）;
covxy=S（12）;
F=finv（1-apn-p）;

syms?x?y?;
s=（[x-xbar?y-ybar]*inv（[sigmax?covxy;covxy?sigmay]）*[x-xbar;y-ybar]）-p*（（n）/（n-p））*F;
s=simplify（s）;
ezplot（s[-14?15]）;
grid;
zoom（10）;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件?????????456??2003-04-03?14:52??confreg.m
?????文件????????4797??2003-04-23?09:42??EMfc.m
?????文件????????1748??2003-03-23?03:18??kmeansit.m