Grouping variable must be a vector or a character array.

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Hazel Sialongo
Hazel Sialongo 2017-1-9
回答： Walter Roberson 2017-1-10
This is my code:
load classify_data
itr = 500;
hWaitBar = waitbar(0,'Image is still classifying...');
for i = 1:itr
data = train_feat;
groups = ismember(test_label,0);
[train,test] = crossvalind('HoldOut',groups);
svmStruct = svmtrain(data(train,:),groups(train),'showplot',false,'kernel_function','linear');
classes = svmclassify(svmStruct,data(test,:),'showplot',false);
end

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回答（1 个）

Walter Roberson
Walter Roberson 2017-1-10
All I can think of is that you might be generating only 0 or 1 train members, in which case groups(train) would be empty or a scalar.

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