About the presence of missing values after predicting with a PMML Ensemble model

KNIME Analytics Platform
1

Hi guys,

I'm using the Tree Ensemble Learner node to model a biological endpoint, and then I export it to a PMML file using the following nodes: Tree Ensemble Model Extract, Table to PMML Ensemble, PMML writer.

In another workflow I use the PMML Reader and the PMML Ensemble Predictor nodes to predict the modeled endpoint for new molecules. Unfortunately after prediction it seems that 7% of molecules have a missing predicted value. Do you know what may be causing this? I have no clue.

Thanks in advance for your help.

Gio

2

Do you get the same predictions from the Tree Ensemble predictor node? 

Or maybe they one class isn't favoured and the selected option for a tie was missing?

3

Hello Swebb,

Thank you for your propt reply. You are completely right, I didn't realize I was having the "missing" option selected for a tie.

Thanks