function?[K]?=?kernel（kerxy）
%?Calculate?kernel?function.???
%?x:?輸入樣本n1×d的矩陣n1為樣本個(gè)數(shù)d為樣本維數(shù)
%?y:?輸入樣本n2×d的矩陣n2為樣本個(gè)數(shù)d為樣本維數(shù)
%?ker??核參數(shù)（結(jié)構(gòu)體變量）
%?the?following?fields:
%???type???-?linear?:??k（xy）?=?x‘*y
%????????????poly???:??k（xy）?=?（x‘*y+c）^d
%????????????gauss??:??k（xy）?=?exp（-0.5*（norm（x-y）/s）^2）??
%????????????????????????????????????????%?norm命令計(jì)算矩陣或向量（x-y）的2-范數(shù)
%????????????tanh???:??k（xy）?=?tanh（g*x‘*y+c）
%???degree?-?Degree?d?of?polynomial?kernel?（positive?scalar）.
%???offset?-?Offset?c?of?polynomial?and?tanh?kernel?（scalar?negative?for?tanh）.
%???width??-?Width?s?of?Gauss?kernel?（positive?scalar）.
%???gamma??-?Slope?g?of?the?tanh?kernel?（positive?scalar）.
%?ker?=?struct（‘type‘‘linear‘）;
%?ker?=?struct（‘type‘‘ploy‘‘degree‘d‘offset‘c）;
%?ker?=?struct（‘type‘‘gauss‘‘width‘s）;
%?ker?=?struct（‘type‘‘tanh‘‘gamma‘g‘offset‘c）;
%?K:?輸出核參數(shù)n1×n2的矩陣
%-------------------------------------------------------------%

switch?ker.type
????case?‘linear‘
????????K?=?x*y‘;?????????%?n*n的矩陣
????case?‘poly‘
????????d?=?ker.degree;
????????c?=?ker.offset;
????????K?=?（x*y‘+c）.^d;
????case?‘gauss‘
????????s?=?ker.width;
????????rows?=?size（x1）;
????????cols?=?size（y1）;???
%?????????K=zeros（rowscols）;
%?????????for?i?=?1:rows
%?????????????for?j?=?1:cols
%?????????????????tmp?=?norm（x（i:）-y（j:））;
%?????????????????K（ij）?=?exp（-（tmp^2）/（s^2））;
%?????????????end
%?????????end
??????tmp?=?zeros（rowscols）;????????
????????for?i?=?1:rows
????????????for?j?=?1:cols
????????????????tmp（ij）?=?norm（x（i:）-y（j:））;
???????????????
????????????end
????????end
?????K?=?exp（-（tmp.^2）/（s.^2））;????
????case?‘tanh‘
????????g?=?ker.gamma;
????????c?=?ker.offset;
????????K?=?tanh（g*x*y‘+c）;
????otherwise
????????K?=?0;
end

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

?????文件???????1871??2013-04-01?22:23??exp15_svdd\kernel.m

?????文件???????4030??2013-04-06?14:00??exp15_svdd\sample_banana_200.mat

?????文件???????1337??2013-05-10?16:35??exp15_svdd\svddSim.m

?????文件???????1701??2013-04-02?11:52??exp15_svdd\svddTrain.m

?????文件???????1277??2014-05-24?09:14??exp15_svdd\svdd_banana_gauss.m

?????文件?????????18??2014-05-24?10:03??exp15_svdd\說明.txt

?????目錄??????????0??2014-05-24?10:03??exp15_svdd

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

????????????????10234????????????????????7