function?K?=?kernel（XYtypeC）??
K?=?X*Y‘;
if（nargin>=3）
???switch?type
???????case?2
???????????a=?C（1）;
???????????b=C（2）;
???????????p=C（3）;?
???????????K?=?（b*K+a）.^p;
???????case?3
????????????X2?=?sum（X.*X2）;%每一行求和
????????????Y2?=?sum（Y.*Y2）;??
????????????XY?=?X*Y‘;??
????????????K?=?-C*abs（repmat（X2[1?size（Y21）]）?+?repmat（Y2‘[size（X21）?1]）?-?2*XY）;??
????????????K?=?exp（K）;
???end
end
????
end??

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件?????????949??2019-05-26?17:55??SVM\data.mat
?????文件????????1531??2018-06-23?22:12??SVM\ex2data1.txt
?????文件?????????437??2018-06-26?08:43??SVM\kernel.m
?????文件?????????263??2018-06-25?17:33??SVM\plotData.m
?????文件?????????193??2018-06-25?17:37??SVM\predict.m
?????文件?????????309??2018-06-26?08:48??SVM\svm_learn.m
?????文件????????1286??2018-06-26?10:45??SVM\SVM_main.m