topic Re: How to interpret leaf statistics plot in SAS EM: decision tree in New SAS User

How to interpret leaf statistics plot in SAS EM: decision tree

ycenycute — Tue, 04 Oct 2022 14:32:02 GMT

In SAS EM: decision tree, how to interpret leaf statistics plot?

I am working on a problem where Y is a binary variable. In the leaf statistics plot, the Y axis is training percentage 1, the X axis is the index. How can I interpret the result?

Re: How to interpret leaf statistics plot in SAS EM: decision tree

sbxkoenk — Tue, 04 Oct 2022 20:45:42 GMT

Hello @ycenycute ,

Are you talking about the Leaf Statistics Bar Chart in the

Interactive Decision Tree Application ??
https://go.documentation.sas.com/doc/en/emref/15.1/n1gvjknzxid2a2n12f7co56t1vsu.htm

Scroll down to "Leaf Statistics Bar Chart".

If that's not the chart you are talking about , show it to us.

Koen

Re: How to interpret leaf statistics plot in SAS EM: decision tree

ycenycute — Wed, 05 Oct 2022 10:52:07 GMT

This is the figure I got.

Re: How to interpret leaf statistics plot in SAS EM: decision tree

sbxkoenk — Wed, 05 Oct 2022 11:31:08 GMT

Hello,

Your target variable is binary and your event-level-of-interest is "1".

The bar chart indicates the percentage of events (1's) in the leaves. For the TRAINing set.

The index is the leaf number , I would think.
Although index=1 seems to me the root node (and that one is not a leaf if anything was grown).

Please check ...

Koen

Re: How to interpret leaf statistics plot in SAS EM: decision tree

ycenycute — Thu, 06 Oct 2022 02:08:53 GMT

I think I get it. The index is for leaf node, ranked by the highest percentage of 1 in the node.

Re: How to interpret leaf statistics plot in SAS EM: decision tree

sbxkoenk — Thu, 06 Oct 2022 08:21:59 GMT

@ycenycute wrote:

I think I get it. The index is for leaf node, ranked by the highest percentage of 1 in the node.

ranked by descending percentage of 1 in the node, indeed !

Koen