[Tikzdevice-bugs] Use of Sys.which() map not give "" if the command is not found

[Charlie Sharpsteen]

Thanks for the details Brian,

This has been added to the issue tracker and we will accelerate the release
of version 0.5.1 which contains fixes to ensure compatibility with the new
graphics device version in R 12.

-Charlie

2010/8/26 Prof Brian Ripley <ripley at stats.ox.ac.uk>

> This concerns packages
>
> adimpro cacher gdata gnumeric highlight maptools runjags skmeans tikzDevice
>
> It looks like you have not consulted the Value section of the current help
> page for Sys.which:
>
> Value:
>
>     A character vector of the same length as ‘names’, named by
>     ‘names’.  The elements are either the full path to the
>     executable/script or some indication that no executable of that
>     name was found.  Typically the indication is ‘""’, but this does
>     depend on the OS (and is a message on Solaris).
>
> So you need an additional check that the result actually is a command (e.g.
> via file.exists).
>
> Can we please have an update addressing this.
>
> (It is likely that Sys.which will be changed in future to incorporate this
> check, but package changes are still needed to work with current and earlier
> versions of R.)
>
> --
> Brian D. Ripley,                  ripley at stats.ox.ac.uk
> Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
> University of Oxford,             Tel:  +44 1865 272861 (self)
> 1 South Parks Road,                     +44 1865 272866 (PA)
> Oxford OX1 3TG, UK                Fax:  +44 1865 272595
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