[R] Problem with % in an example when running R CMD check

[Frank Harrell]

Using

platform       x86_64-pc-linux-gnu          
arch           x86_64                       
os             linux-gnu                    
system         x86_64, linux-gnu            
status                                      
major          2                            
minor          13.0                         
year           2011                         
month          04                           
day            13                           
svn rev        55427                        
language       R                            
version.string R version 2.13.0 (2011-04-13)

I am getting an error I haven't seen before when running R CMD check on a
package:

Warning: parse error in file 'rms-Ex.R':
14: unexpected symbol
376:     f <- ols(y ~ pol(x1,2) + pol(x2,2) + pol(x1,2) 
377:              subset
                  ^
The original (quote old) code in an 'example' section of an .Rd file is:

    f <- ols(y ~ pol(x1,2) + pol(x2,2) + pol(x1,2) %ia% pol(x2,2),
             subset=group==g)

Putting \ before the % gets around the problem but I didn't have to do that
before.

Any ideas?
Thanks Frank


-----
Frank Harrell
Department of Biostatistics, Vanderbilt University
--
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