%%
%?File?Name:?AdaBoost
%?This?is?the?implementation?of?the?ada?boost?algorithm.
%?Parameters?-?very?easy?to?guess?by?name...
%?Return?values:?i?-?hypothesis-index??vector.
%????????????????t?-?threshhols?vector
%????????????????beta?-?weighted?beta.
%%
function?boosted=adaBoost（traintrain_labelcycles）
????disp（‘running?adaBoost?algorithm‘）;
????d=size（train）;
	distribution=ones（1d（1））/d（1）;
	error=zeros（1cycles）;
	beta=zeros（1cycles）;
	label=（train_label（:）>=5）;%?contain?the?correct?label?per?vector
	for?j=1:cycles
????????if（mod（j10）==0）
????????????disp（[jcycles]）;
????????end
	[it]=weakLearner（distributiontrainlabel）;
????error（j）=distribution*abs（label-（train（:i）>=t））;
????beta（j）=error（j）/（1-error（j））;
????boosted（j:）=[beta（j）it];
????distribution=distribution.*?exp（log（beta（j））*（1-abs（label-（train（:i）>=t））））‘;
????distribution=distribution/sum（distribution）;
end
????
????

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件????????907??2005-07-29?10:13??19854803Adaboost\adaBoost.m

?????文件????????757??2002-07-26?09:31??19854803Adaboost\getError.m

?????文件???????2030??2003-12-20?17:12??19854803Adaboost\runAdaBoosting.m

?????文件?????????97??2002-09-16?10:42??19854803Adaboost\start.m

?????文件?????514824??2002-07-25?13:50??19854803Adaboost\usps.mat

?????文件????????310??2003-12-16?19:17??19854803Adaboost\weakLearner.m

?????目錄??????????0??2009-07-05?22:23??19854803Adaboost

-----------?---------??----------?-----??----

???????????????518925????????????????????7