error -index must be a positive integer or logical.
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I have code for rbf function with cv
xdata=[0.5 25 1 0 ;8 9 21 0;12 25 1 0 ;8 9 21 0; 12 25 1 1 ;8 9 21 0]
ydata=[2 6 9 .6 ;2 8 7 4 ;2 6 9 8 ;2 8 7 4;2 6 9 8 ;2 8 7 4]
training=xdata(:,1:4);test=xdata(:,3:4);
groups=xdata(:,end);cp = classperf(groups);
samplesize=size(xdata);
samplesize=size(xdata);
c=cvpartition(samplesize,'kfold',2);
cp = classperf(groups);
for i=1:2
trainInd = find(c.training(i));
testInd = find(c.test(i));
trainXMat=xdata(xdata(trainInd));
tstXMat=xdata((xdata(testInd)));
trainYMat=ydata(ydata(trainInd));
tstYMat=ydata((ydata(testInd)));
cp = classperf(cp, trainInd , trainInd )
end
i get error as
Attempted to access xdata(0.5); index must be a positive integer or logical.
Error in ==> yasrbf at 20
trainXMat=xdata(xdata(trainInd));
please help
some of my data in xdata and ydata have values in range 0 to 1
回答（2 个）
Walter Roberson
2012-4-10
0 个投票
Why are you using xdata(xdata(trainInd)) instead of just xdata(trainInd) ?
Jan
2012-4-10
0 个投票
As the error message tells clearly, indices must be positive integers. You cannot access the element between the zero'th and the first one like "xdata(0.5)".
Perhaps you want xdata(trainInd) without a further nesting.
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