[R] Truncated R output in Sweave

[Frank E Harrell Jr]

Dear Colleagues:

In producing a book or a handout I sometimes cut out a large part of the 
printed output of an R function, substituting ... for that chunk. 
Deleting non-essential output saves paper.  It would be nice to have a 
capability in Sweave to allow the user to specify a starting and an 
ending regular expression that would identify consecutive lines of 
output to replace with ..., without showing the extra code required to 
do this to the user.  I would want the LaTeX output, other than the 
omission, to appear the same as if the section were not omitted.  Does 
anyone have an idea of how to do this elegantly?

By the way I just discovered the SweaveListingUtils package by Peter 
Ruckdeschel (on CRAN), which produces beautifully printed R code in 
Sweave code chunks.  I put some info about it at 
http://biostat.mc.vanderbilt.edu/SweaveTemplate which has our Sweave 
template for statistical reports.

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