'Index must be a positive integer less than or equal to the number of test sets.'

Hi

i'm trying to create 10-fold cross validation for my CNN. To creat the 10 batches i'm using for loop, but it's giving this error again and again.

'Index must be a positive integer less than or equal to the number of test sets.'

Possibly how i can change the loop to initilize batches.?

selectBatch=cell(1,10);

for k=1:10

%%Prep Data

% 10 kfold crossvalidation indicies

c = cvpartition(204,'kfold',10);

testInd = test(c,selectBatch(k));

trainInd = ~testInd;

epochsTarget = zeros(204,1);

epochsTarget(103:end)=1;

epochsTarget= categorical(epochsTarget);

...............

end

[Stephen23]

Duplicate:

https://www.mathworks.com/matlabcentral/answers/496107-index-must-be-a-positive-integer-less-than-or-equal-to-the-number-of-test-sets