R help - Sep 2013 - Sweave: printing an underscore in the output from an R command

I am working with Sweave and would like to print out into my latex document the
result of the R command
version$platform
So what I first tried in my .Rnw document was \Sexpr{print(version$platform)}.

However, the output from this command is the string
"x86_64-apple-darwin10.8.0" (without the quotes). This contains an
underscore, which is a special character in tex and so I get an error message
from latex.

I can get round this by using sub to replace underscore with a space, but I
would like to know how to print the underscore if I really wanted to do so.

You have to escape the underscore

\Sexpr{gsub("_", "\_", print(version$platform))}

Best regards,

Thierry

________________________________________
Van: r-help-bounces at r-project.org [r-help-bounces at r-project.org] namens
David Epstein [David.Epstein at warwick.ac.uk]
Verzonden: maandag 2 september 2013 17:38
Aan: r-help at r-project.org
Onderwerp: [R] Sweave: printing an underscore in the output from an R command

I am working with Sweave and would like to print out into my latex document the
result of the R command
version$platform
So what I first tried in my .Rnw document was \Sexpr{print(version$platform)}.

However, the output from this command is the string
"x86_64-apple-darwin10.8.0" (without the quotes). This contains an
underscore, which is a special character in tex and so I get an error message
from latex.

I can get round this by using sub to replace underscore with a space, but I
would like to know how to print the underscore if I really wanted to do so.

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