Gábor Csárdi wrote:
Dear All,

I have the following in a .Rd file:
...
      human readable (not binary) format. The format itself is like
      the following:
      \preformatted{
        \# vertex1name
        vertex2name [optionalWeight]
        vertex3name [optionalWeight]
      }
      Here, the first vertex of an edge is preceded with a pound sign
...

and it is fine with R 2.9.2, but fails on R-devel, when building the
PDF version of the manual:
...
* checking PDF version of manual ... WARNING
LaTeX errors when creating PDF version.
This typically indicates Rd problems.
LaTeX errors found:
! You can't use `macro parameter character #' in vertical mode.
<argument> ...ike the following: \begin {alltt} ##
                                                   vertex1name vertex2name [...
l.9051 listed one per line on subsequent lines.}

* checking PDF version of manual without index ... ERROR

To be precise, this is
* using R version 2.10.0 Under development (unstable) (2009-09-27 r49847)

Is there a way to escape the '#' for LaTeX?

I believe the Latex macro you want is \sharp, which isnt an Rd macro, so you'd need something like
\latex{\sharp}{#}.

Duncan Murdoch

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