hi guys!
I come to you for aks something about proc arboretum. Which splitt criteria it does when doesnt put anyone critera in SPLIT statement?
thx.
From The ARBORETUM Procedure documentation:
Criteria for Interval Targets
VARIANCE reduction in square error from node means
PROBF p-value of F test associated with node variances (default)
Criteria for Nominal Targets
ENTROPY Reduction in entropy
GINI Reduction in Gini index
PROBCHISQ p-value of Pearson chi-square for target vs. branches (default)
Criteria for Ordinal Targets
ENTROPY Reduction in entropy, adjusted with ordinal distances
GINI Reduction in Gini index, adjusted with ordinal distances (default)
Nice!
Other question: is it possible to arboretum split in three or more nodes? I'm reading de proc arboretum but nothing show up.
Thank you so much!
The MAXBRANCH= option is documented as an option to the TRAIN statement. (" Any integer from 2 through 50 is permitted.") Options to the TRAIN statement are generally accepted as options to the PROC ARBORETUM statement also.
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