PROC HPSPLIT: How to force a variable into a decision tree (SAS 9.4)

[Adrian10]

Hi all!

I need to force a variable in a decision tree. My code is the following:

proc hpsplit data = &lib..bds_vars maxdepth = 4 maxbranch = 4 nodestats=DT_1
target ind_default_7;

input risk_level/*the one whom is relevant*/ cliente_type/*the one I need to force*/  ;
code file="%sysfunc(pathname(work))/model_dtree.sas"; 
rules file="C:\Users...\Results\rules_dtree.txt";
output importance = imporvar; 
run;

NOTE. the criterion choosen is ENTROPIA (SAS default criterion)

Thanks a lot,

AP

[H]

I don't have a direct solution for you. I was personally trying to force a certain tree to be used. Of note, the leaves option below will create a tree with set number of terminal nodes, not sure that may help you or others. Also, a weird way to force a split in,  may be to just split your data into two sets and fit two trees. But I am sure that probably won't address what you are trying to do.

prune costcomplexity (leaves=10);