Is it possible to create regression trees in Knime? I.e. decisions trees for predicted values (no classification)?
Currently not, but you might want to check out the Weka package in KNIME.
I have Weka package version 3.7 for Knime and still cannot create numerical regression trees, only classifications? What is required to create a numerical Random Forest model in Weka?
Just to clarify:
The KNIME AP now provides the Simple Regression Tree Learner/Predictor nodes that allow to learn regression trees.
I will answer to Your question regarding random forest in the other thread You opened ;)