[Rd] Regression stars

[peter dalgaard]

On Feb 12, 2013, at 17:05 , Brian Lee Yung Rowe wrote:

> 
> I thought that the default was the way it was for performance reasons. For large data.frames or repeated applications, using factors should be faster for non-trivial strings.

I think not. Historically, it's more like "In statistics we have two kinds of variables, numerical and categorical. OK, so we have the occasional truly character-type variables like name and address, let's handle those as a special case". 


-- 
Peter Dalgaard, Professor
Center for Statistics, Copenhagen Business School
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Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com