Hi,
The problem in above code was that crossval does the train-test spilt and it takes in the Ytr as column vector but you did provide Ytr are a 2-D Matrix due to which we were getting that array bound error.The below code snippet should resolve and simplify your issue.
load data
% hpartition = cvpartition(81,'Holdout',0.2);
% idxTrain = training(hpartition);
% Xtr = X(idxTrain,:);
% Ytr = Y(idxTrain,:);
% % Ytr_1 = Y(idxTrain,1);
% % Ytr_2 = Y(idxTrain,2);
% idxNew = test(hpartition);
% Xte = X(idxNew,:);
for i=1:2
for j = 1:3
fcn{i,1} = @(Xtr, Ytr, Xte) predict(fitlm(Xtr,Ytr), Xte);
fcn{i,2} = @(Xtr, Ytr, Xte) predict(fitrsvm(Xtr,Ytr), Xte);
fcn{i,3} = @(Xtr, Ytr, Xte) predict(fitrgp(Xtr,Ytr), Xte);
mse(i,j) = crossval('mse', X, Y(:,i),'Predfun',fcn{i,j}, 'kfold',10);
end
