[R] How to retrieve data frame column names?

[Prof Brian Ripley]

On Tue, 13 May 2003, Song, Guangchun wrote:

> Does anyone tell me how to retrieve the data frame column names?
> 
> I'm working on coxph model to analyze survival data of Affy DNA chips.
> 
> I get the coxph coef p-value for each probe and want output the probe name
> with the p-value.  The probe names are the data frame column names.
> 
> How can I do this?

That is rather vague!  At a guess, you did

fit <- coxph(..., data=foo, ...)

and want to retrieve `foo'.  That's stored in fit$call$data.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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