topic How to solve ERROR: Maximum levels of 512 exceeded ? in SAS Enterprise Guide

How to solve ERROR: Maximum levels of 512 exceeded ?

cody_q — Tue, 19 Mar 2013 05:09:42 GMT

Dear all ,

I have tried using the (2) suggested methods of changing variable from nominal to interval and also to add %let EM_TRAIN_MAXLEVELS=n; to project start code.

My dataset doesnt allow me to choose interval and i have placed the code in the Code utility .

Currently, the flow is SAS Code -> Dataset -> Decision tree

In my dataset i have user_id , item_id , results cols .

results is 1 for followed , -1 for not following

I wanna based the decision tree on 2 leave nodes ( followed ) or (not followed)

Thanks
YL

Re: How to solve ERROR: Maximum levels of 512 exceeded ?

kingsley — Sat, 07 Dec 2013 13:54:25 GMT

This error does not necessarily mean that there is a problem. If you encounter this error and do not suspect a problem with your data, then you can eliminate this message in two ways.

Change the level of the variable from Nominal to Interval in the data source.
Add the following line of code in the Project Start Code:
%let EM_TRAIN_MAXLEVELS=n;
N equals the maximum number of levels that you want to allow.

Use whichever method you judge to be statistically appropriate for your analysis.

http://support.sas.com/kb/20/054.html