Export Tree Ensemble PMML properly and import it again for predictions

KNIME Analytics Platform
1

Hi!

I need to export the pmml code of a tree ensemble (produced by the Tree Ensemble Learner node) and load it again for making predicitons. In order to export the pmml code I used so far Tree Ensemble Learner -> Tree Ensemble Model Extract -> Table to PMML Ensemble -> PMML Writer. My first question: are these nodes sufficient to export the whole tree ensemble pmml?

In order to import it again in another workflow (my customer wants separate workflows for each data mining task) I used PMML Reader.

And then, my second and most important question: if I need to produce predictions including the predicted probabilities, which predictor node should I use? Is the PMML Ensemble Predictor sufficient? I'm not sure about that as it produces some missing values in the predicted probs..

Thank you very much in advance!

2

... or, what I'd love to do would be to use the Tree Ensemble Predictor itself, but it seems that it ain't compatible with the exported pmml?

3

You can write the complete tree ensemble with a model writer into a file. This can be read with the model reader back in. 

Cheers, Iris 

4

Thanks, it works as it should! My former solution worked as well but I didn't trust in it as it was another predictor. And indeed: the prediction results differ a little bit.