Yes, same way. I had been battling before and then solved it between my post
and your response.
ICA[Strain=="49134",]
One just has to be careful to recognize that it is being handled as a
character variable and so one has to use the level label.
On 09 Sep 2006 19:08:39 +0200, Peter Dalgaard <[EMAIL PROTECTED]>
wrote:
>
> "Farrel Buchinsky" <[EMAIL PROTECTED]> writes:
>
> > It is easy to index on numeric variables.
> > How does one index on a variable that is a factor?
>
> Er, same way. Unless you attach some novel meaning to "index on".
> Example?
>
>
> --
> O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B
> c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K
> (*) \(*) -- University of Copenhagen Denmark Ph: (+45)
> 35327918
> ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45)
> 35327907
>
--
Farrel Buchinsky
Mobile: (412) 779-1073
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