?? singlenativebayes.m
字號:
%輸入訓練集和一條測試列,輸出該列的分類類別
function y=singleNativebayes(train,singletest)
[row col]=size(train);
y=[];
c1=0;
c2=0;
Sum1=1;
Sum2=1;
for i=1:col-1
m1(i)=0;
m2(i)=0;
end
for i=1:row
if train(i,col)==2
c1=c1+1;
end
if train(i,col)==4
c2=c2+1;
end
for j=1:col-1
if train(i,j)==singletest(j)&train(i,col)==2
m1(j)=m1(j)+1;
end
if train(i,j)==singletest(j)&train(i,col)==4
m2(j)=m2(j)+1;
end
end
end
for j=1:col-1
if m1(j)==0
m1(j)=0.1;
end
if m2(j)==0
m2(j)=0.1;
end
end
for k=1:col-1
if c1==0
Sum1=0;
else
Sum1=Sum1*m1(k)/c1;
end
if c2==0
Sum2=0;
else
Sum2=Sum2*m2(k)/c2;
end
end
Sum1=Sum1*c1/(c1+c2);
Sum2=Sum2*c2/(c1+c2);
if Sum1>Sum2
y=2;
else
y=4;
end
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