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List:       wekalist
Subject:    Re: [Wekalist] M5P's regression tree: information in the leaves
From:       "Peter Reutemann" <fracpete () waikato ! ac ! nz>
Date:       2008-06-24 22:12:56
Message-ID: 548e07050806241512ia63ada7w6707aa19262e7706 () mail ! gmail ! com
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> I would need you help to figure out the meaning of the information present in the \
> leaves of the regression trees returned by the M5P algorithm. I would very much \
> appreciate any helpful hint. 
> --------------------------
> 
> What is the percentange value present in every leaf? How is this value defined?

See here:
https://list.scms.waikato.ac.nz/mailman/htdig/wekalist/2006-January/005878.html

> --------------------------
> 
> Most of my leaves have values above 70 - 80 %. I assume, this does not represent a \
> great fit. Is my understanding correct? How can one improve this? 
> --------------------------
> 
> Also, I notice that, although I set the minimum number of instances per leaf, for \
> example, to 10, it might still happen that some leaves have less instances than my \
> threshold. Do you happen to know why?

See here:
https://list.scms.waikato.ac.nz/mailman/htdig/wekalist/2006-May/007159.html

Cheers, Peter
-- 
Peter Reutemann, Dept. of Computer Science, University of Waikato, NZ
http://www.cs.waikato.ac.nz/~fracpete/ Ph. +64 (7) 858-5174

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