[R] Re: R library(e1071) question: definition of performance in tune.* functions

From: David Meyer <david.meyer_at_wu-wien.ac.at>
Date: Wed 14 Jul 2004 - 06:54:31 EST


> When we run tune.* for parameter tuning, we get performance value.
> Can you tell me what the definition of it is?

The values returned by tune() are Mean Squared Errors in case of regression, and simple rates (*no* percentages) in case of classification. As Andy already suggested, you might want to check if your target variable is indeed a factor. In case it is and you still get values greater than 1, drop me a mail with a piece of code (and data) enabling me to reproduce the phenomenon.


Dr. David Meyer
Department of Information Systems

Vienna University of Economics and Business Administration
Augasse 2-6, A-1090 Wien, Austria, Europe
Fax: +43-1-313 36x746 
Tel: +43-1-313 36x4393
HP:  http://wi.wu-wien.ac.at/Wer_sind_wir/meyer/

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Received on Wed Jul 14 07:01:45 2004

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