Building CHAID tree
I'm very new to rapid miner. Please excuse me if this question is really basic. I was trying to develop a CHAID Tree to score bank customers based on a bunch of demographic parameters. The label variable takes the values "fault" and "fine". Here is the process I followed:
1. I created a process tree with an excel data source operator and followed by the CHAID operator.
2. I specified the file name, label and id columns in the Excel Source operator
3. Then I hit the run button to start the execution - I didn't find any field which allows you to select the variables you want in the model. I thought the CHAID operator by default would select the variables to develop the model.
4. The program executes.
Now, in the output: I did'nt find any variable entering the CHAID model. I just had 2 leaves in the output tree. No other splitting variable entered the model. I remember, when I did the same in SPSS atleast a couple of other variables entered the model.
What am I doing wrong here? How would I allow other variables to enter the model?
Your guidance will be extremely useful.