[R] making an inicator variable

[John Fox]

Dear Jen,

There are lots of different ways to do what you want -- you've already had
two suggestions -- but you might consider whether you really need to do it.
In particular, R will generate its own indicator variables (and other kinds
of contrasts) in linear and other statistical models (see Section 11 of the
Introduction to R manual that comes with R). It's hard to give really good
advice without knowing more about the context.

I hope this helps,
 John

--------------------------------
John Fox
Department of Sociology
McMaster University
Hamilton, Ontario
Canada L8S 4M4
905-525-9140x23604
http://socserv.mcmaster.ca/jfox 
-------------------------------- 

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Jennifer Dillon
> Sent: Tuesday, October 25, 2005 2:52 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] making an inicator variable
> 
> Hello,
> 
> I am almost a total novice, and I am sure there must be an easy (and
> basic) way to turn a variable of 1's and 2's into a variable 
> of zeros and ones.  This is in a data frame, but if I could 
> do it with vectors, that's all I need.
> 
> Can someone tell me how?
> 
> Thanks so much,
> 
> Jen
> 
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