matlab - How to find an accuracy of a classifier -

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matlab - How to find an accuracy of a classifier -

i using knn classifier , found knnclassify classification me in matlab.

code:

class = knnclassify(testvec,trainvec, trainlabel);

the problem face now, knnclassify classifies points , gives them value find accuracy of classification.

i tried this:

class = knnclassify(testvec,trainvec, trainlabel); cp = classperf(testlabel,class); cp.correctrate

it giving me error:

??? error using ==> classperf @ 149 when class labels of cp object numeric, output of classifier must non-negative integers or nan's. error in ==> knn @ 3 cp = classperf(testlabel,class);

is there improve method find accuracy of classifier or corrections should improve code above?

the values of labels should 0 or 1.

the code type :

cp = classperf(trainlabel); class = knnclassify(testvec,trainvec, trainlabel); cp = classperf(testlabel,class); cp.correctrate

matlab knn

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