On Jan 23, 2012, at 5:50 AM, Manabu Sakamoto wrote:
> Dear list,
>
> I gave up trying to fix my movie3d (rgl library) issue in my PC
> (completely black gif/png file) and went ahead and installed MacPorts
> and ImageMagick onto my iMac (OSX ver 10.6.8). I think ImageMagick is
> successfully installed in its default location (under /opt/local),
I'm not sure it has a default location, but if you are using a package
management system, then there might be a default location for all the packages
installed in that manner.
> and
> I ran movie3d but I get the following error:
>
> Error in system("convert --version", intern = TRUE) :
> error in running command
> sh: convert: command not found
>
> so I'm guessing R can't find the "convert" executable file, which is
> in "Sys.getenv("PATH")", in its system search path, which I presume is
> "/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin" that I got using
> Sys.getenv("PATH").
>
> Does anyone know how I can resolve this? For instance, should I move
> or copy the convert executable file to an appropriate directory (which
> I don't really know where exactly, i.e. I can't find a folder "usr" in
> the Macintosh HD),
The /usr/ directory is hidden and not displayed by the default settings of the
Finder.app, but you should be able to change those settings if you da a Google
search and use Terminal.app to start up a bash shell or you can use
Terminal.app and type these two lines:
cd /
ls
>
> or can I add "/opt/local/bin" to the R's search
> path?
I'm not sure whether executing:
Sys.setenv("PATH") <- paste(Sys.getenv("PATH"), ":/opt/local")
... will necessarily cause success with a system()-mediated call, since my
fragile understanding is that the system()-calls use the bash shell which has a
different PATH variable than does R called from R.app which is what I suspect
you are using.
This is probably better addressed to the R-SIG-Mac mailing list and you will
need to subscribe:
r-sig-mac R <[email protected]>
> best regards,
> Manabu
>
> --
> Manabu Sakamoto, PhD
> School of Earth Sciences
> University of Bristol
> [email protected]
>
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
David Winsemius
Alameda, CA, USA
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