[R] plot methods for summary of rms objects

[David Winsemius]

On Oct 11, 2011, at 3:20 PM, Rob James wrote:

> The integration of plot methods for various outputs from rms  
> packages is a great appreciated aspect of the rms package.
>
> I particularly like to use:
>
> plot(summary(model))
>
> for my own purposes, but... for publication/presentation I need to  
> modify details like variable names, or the number of signficant  
> digits used in the figure annotations.
>
> Is there a simple way to modify the plot inputs arising from  
> summary, or is it necessary to hack the summary object?
>

If you type:

methods(summary)

... you should see why it might be very difficult to answer your  
question in its current state of vagueness. I just ran the example in  
help(summary.rms) and it appears that it used base graphics and that  
if such output is your target, you would need to either hack the code  
or hack the pdf file. Much of the graphical output from rms functions  
has been ported to lattice graphics, but apparently not the version  
for summary.rms objects.

If you have the data and can redo the analysis, read on. The  
comparison levels used by summary.rms are set with datadist and that  
is probably what you should be spending some time understanding, There  
are other possibilities than just using a datadist(data_object) call.

?datadist

--

David Winsemius, MD
West Hartford, CT