[R] How to retrieve data frame column names?
Prof Brian Ripley
ripley at stats.ox.ac.uk
Tue May 13 18:30:11 CEST 2003
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)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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