[R] range of group variables

Joshua Wiley jwiley.psych at gmail.com
Fri Mar 2 08:01:40 CET 2012

You could loop through the list using lapply() or the like.  One way would be to subset the data and use . Notation which expands to all variables in the dataset not used elsewhere in the model (ie not the outcomes).  



On Mar 1, 2012, at 14:29, sajjad R <sajjad_r at hotmail.com> wrote:

> Dear All,
> I hope to run some simple survival analysis using the cox-proportional hazard models in R, my command will look like below:
> cox <- summary( coxph( Surv( mortality , TIME ) ~ Independent variables ) )
> My query is about specifying a range of independnt variables in R,
> such that each independent variable is included as the main defining variable independently of other variables in the variable list. 
> I have around 10,000 independent variables or groups by which I hope to study differences in mortality rates over a period of time. 
> All the 10,000 variables have one thing in common, i.e. their names start with the same alphabets rs followed by unique 6-8 digit numbers.
> Regards,
> Sajjad
>    [[alternative HTML version deleted]]
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