To repair the error about classification

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indices = crossvalind('Kfold',label,5);
cp=classperf(label);
for i = 1:5
test = (indices == i); train = ~test;
class =knnclassify(dim(test,:),dim(train,:),label(train,:),5,'euclidean', 'nearest');
classperf(cp,class,test)
end
cp.ErrorRate
The error:
Undefined function or variable 'label'.
Error in knn (line 1)
indices = crossvalind('Kfold',label,5);

Accepted Answer

Star Strider
Star Strider on 23 Mar 2021
The ‘label’ variable must have been defined and must exist in your workspace before it is used as an argument to crossvalind.
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