R help - May 2007 - File path expansion

R-Help,
I discovered a "mis-feature" is ghostscript, which is used by the
bitmap
function. It seems that specifying file names in the form "~/abc.png"
rather than "/home/directory/abc.png" causes my GS to crash when I
open
the bitmap device on my Linux box.

The easiest solution would seem to be to intercept any file names in the
form "~/abc.png" and replace the "~" with the user's
home directory. I'm
sure I could come up with something involving regular expressions and
system calls to do this in Linux, but even that might not be system
independent. So, I wanted to see if anyone knew of a native R solution
of converting "~" to its full path expansion.

Thanks,
Robert

Try

?path.expand

On 5/25/07, McGehee, Robert <Robert.McGehee at geodecapital.com>
wrote:
> R-Help,
> I discovered a "mis-feature" is ghostscript, which is used by the
bitmap
> function. It seems that specifying file names in the form
"~/abc.png"
> rather than "/home/directory/abc.png" causes my GS to crash when
I open
> the bitmap device on my Linux box.
>
> The easiest solution would seem to be to intercept any file names in the
> form "~/abc.png" and replace the "~" with the
user's home directory. I'm
> sure I could come up with something involving regular expressions and
> system calls to do this in Linux, but even that might not be system
> independent. So, I wanted to see if anyone knew of a native R solution
> of converting "~" to its full path expansion.
>
> Thanks,
> Robert
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

> path.expand("~")
[1] "/home/maechler"
>>>>> "RobMcG" == McGehee, Robert <Robert.McGehee at
geodecapital.com>
>>>>>     on Fri, 25 May 2007 11:44:27 -0400 writes:
    RobMcG> R-Help,
    RobMcG> I discovered a "mis-feature" is ghostscript, which is
used by the bitmap
    RobMcG> function. It seems that specifying file names in the form
"~/abc.png"
    RobMcG> rather than "/home/directory/abc.png" causes my GS to
crash when I open
    RobMcG> the bitmap device on my Linux box.

    RobMcG> The easiest solution would seem to be to intercept any file names
in the
    RobMcG> form "~/abc.png" and replace the "~" with the
user's home directory. I'm
    RobMcG> sure I could come up with something involving regular expressions
and
    RobMcG> system calls to do this in Linux, but even that might not be
system
    RobMcG> independent. So, I wanted to see if anyone knew of a native R
solution
    RobMcG> of converting "~" to its full path expansion.

    RobMcG> Thanks,
    RobMcG> Robert