function?[?Dltheta?]?=?Derivation（?x?y?theta?）
%?計(jì)算對(duì)theta求導(dǎo)
%???Detailed?explanation?goes?here
mu?=?1./（1+exp（-x*theta））;
for?m?=?1:length（theta）
????Dltheta（m）?=?（y-mu）‘*x（:?m）;
end
Dltheta?=?Dltheta（:）;
end

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

?????文件????????686??2014-03-10?09:24??LogisticRegression.m

?????文件???????3267??2011-01-29?00:13??q1x.dat

?????文件???????1683??2011-01-29?00:13??q1y.dat

?????文件????????228??2014-03-07?11:05??Derivation.m

?????文件????????178??2014-03-07?11:29??Hassian.m

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

?????????????????6042????????????????????5