how to train 3D data using treebagger/random forest method in MATLAB?

Hi, i want to ask, i usually sees example of treebagger using only 2D data and not higher than that. I would like to ask for your advice or tips on how should i train and classify the 3D data using treebagger? Is it the format of the code same as the lower dimensional data or it has any other format? Because as the example it only train X and Y, but for me, I need to train X,Y and Z data. I already tried in Matlab but it always stuck on the same error such as 'X must be numeric matrix', 'Error in ClassificationTree.prepareData', error in 'bagger = init(bagger,X,Y,makeArgs{:});' and so on.

I hope anyone could give guidance to me on how to train and classify those data. I really appreciate all of your help. Thank you.