Keith Ponting wrote, on Wed, 18 Jun 2008 08:28:56 -0400:

Hi,

I am enjoying using the listings package with R, but have two comments and one question:
1) Comments - I am modifying the standard style with: alsoother={_$(},alsodigit={.=} because:
a. In R and S, dot is allowed in variable names, so a variable named for.ever is perfectly valid and will (by default) get keyword style for the “for” and plain for the “.ever” - I would like to suggest this one as a modification to the package;
b. Likewise named arguments in function calls can be keyword names and look odd in keyword style - this one with the “=” is perhaps more debatable.
2) Question: Using pdflatex generates pdf files with very nice looking listings, but when I cut and paste ‘R’ code from those files I get some curious characters. Most I can fix with the literate switch: literate={<-}{{\tt <-}}1 {~}{{\tt \~{}}}1 {|}{{\tt |{}}}1 {\{}{{\tt \{}}1 {\}}{{\tt \}}}1, but every “{“ becomes an “f” via the cut and paste; likewise every “}” becomes a “g”. My attempt at fixing it with literate (using escaped \{ and \}) is as shown, but that does not work. I have attached files illustrating the problem. Do you know of a way around this, please?

Thankyou,

Keith Ponting