Re: [R] aggregate example : where is the state.region variable?

From: Richard M. Heiberger <>
Date: Tue 22 Aug 2006 - 23:53:30 EST

> there is
> no factor in the dataset but why there is not one and
> why a call to another dataset is totally opaque.

The reason is purely historical. The state dataset is about 10 years older than the data.frame concept. At the time the state.* variables were constructed it was not possible to put numeric data and factor data into the same rectangular structure. mailing list PLEASE do read the posting guide and provide commented, minimal, self-contained, reproducible code. Received on Wed Aug 23 00:27:12 2006

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