[R] Survival Curves

[David Winsemius]

On Apr 16, 2012, at 10:24 AM, robgriffin247 wrote:

> Hello
> I'm trying to make survival curves for some longevity data -
> 100 males and 100 females, some of which are still living (not dead  
> at the
> end of survey)
>
> I would like to make sex specific survival curves as time on the X  
> axis,
> proportion alive on the Y, and a line for each sex (two lines)
>
> Data looks like this:
> Focal	DOB	        DOD	        Longevity	    Sex
> 1	        89-04-20	na	                na	                    Female
> 2	        54-02-20	08-04-14	54		            Female
> ...

You should be looking at these help pages:

?read.table

?strptime
?as.Date

help(package=survival)  #  Which should show you where to get its  
vignette.

?survfit

>
> Any suggestions of functions to use? I've not worked with time data  
> (this is
> yy-mm-dd) before so not sure how to handle it
> Any tips and advice are greatly appreciated!
>
> Thanks,
> Rob
>
> --
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>
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David Winsemius, MD
West Hartford, CT