[R] Unable to get Legend with survplot rms package

[Frank E Harrell Jr]

Aric Gregson wrote:
> On Mon, 26 Oct 2009 15:10:42 -0700
> Frank E Harrell Jr <f.harrell at vanderbilt.edu> wrote:
> 
>>> survplot(survest(fit.example1), n.risk=T, conf='none',
>>> cex.n.risk=.85, dots=T, col='gray10', lty=2)
>> The argument to survplot should be a cph or psm or survfit object (or
>> a survest result on a psm object).
> 
> My apologies, all that and I made a typo. I have been doing:
> 
> survplot(survfit(fit.example1), n.risk=...)

But fit.example1 is a cph object.  It can go directly to survplot.

Best to take a break and read over more documentation.

> 
> Perhaps this is still incorrect?
> 
> It does plot, but no legend, so it is likely incorrect. Trying to plot
> the cph object does not work for me. I get an error about the datadist
> not including the data. I did make a datadist that is the master
> dataframe of which what I am trying to plot is a subset thereof.

Best to do that first, after require(rms).

Please read the posting guide also.

Frank

> 
> Thanks, Aric
> 
> 
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-- 
Frank E Harrell Jr   Professor and Chair           School of Medicine
                      Department of Biostatistics   Vanderbilt University