readata.m

模式识别,对iris数据进行分类,svm算法

function Iris=readata()

%%%%%%%%%%%%%%%%%%%%%%%Read Iris dataset%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
fd=fopen('D:\Iris\iris.data','r');
Iris=fread(fd,'uint8=>char');
fclose(fd);
k=1;
for i=1:size(Iris)
    if((Iris(i)>='0'&&Iris(i)<='9')||Iris(i)=='.'||Iris(i)==',')
        charstr(k,1)=Iris(i);
        k=k+1;
    end
end
numstt=1;  k=1;
for i=1:size(charstr)
    if(charstr(i)==',')
        numend=i;
        Irisdata(k,1)=str2double(charstr(numstt:numend-1,1));
        numstt=numend+1;
        k=k+1;
    end
end
Irisdata=reshape(Irisdata,4,150);
Irisdata=Irisdata';
xx=zeros(150,5);
for i=1:50
    xx(i,1)=1;
end
for i=51:100
    xx(i,1)=2;
end
for i=101:150
    xx(i,1)=3;
end
xx(:,2:5)=Irisdata;
Irisdata=xx;
Iris=Irisdata;