EM12.1, rule induction note question

[user80]

After run 'rule induction' in EM12.1, from the results I got the first rip with a 100 pure node(say node 7) , but the next rips didn't take the 7 node rows away. Anyone knows why? Thanks.

[WendyCzika]

Can you explain more what you mean by the 7 node rows were not taken away?

Thanks,

Wendy

[user80]

Actual situation was that node 4, in rip4, had 100% pure (see below a tested sample), but was not removed (it said: no leaf was rippd from the model), I expected node 4's rows/observations should be removed for next rips, or further modeling process.

RIP4 Leaf Table: Threshold= 100
No leaf was ripped from the model.

                  Predicted:    Predicted:
Node         N     target=0      target=1

  4     484942       1.0000        0.0000
11      50101       0.9993        0.0007

... 

...

....

[WendyCzika]

I see, thank you for clarifying.

My only thought is that with the large sample size for node 4, maybe the purity isn't exactly 100% as shown, but actually 99.999 or something and that precision is just not displayed here.  You could try changing the Purity Threshold property to 99 and see if it rips node 4 as expected in that case.