topic Re: proc arboretum in SAS Data Science

proc arboretum

Odair — Wed, 08 Aug 2018 17:40:52 GMT

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.

Re: proc arboretum

PadraicGNeville — Wed, 08 Aug 2018 18:37:42 GMT

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)

Re: proc arboretum

Odair — Thu, 09 Aug 2018 17:55:34 GMT

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!

Re: proc arboretum

PadraicGNeville — Mon, 13 Aug 2018 16:21:26 GMT

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.