[R-SIG-Mac] rgl on macosx

[stefano iacus]

Ciao Simone,
the problem is that apparently libpng is not present on your system.
On http://www.economia.unimi.it/R/ you find some insturctions on how to 
get this dll even though you need to install the Apple Developer Tools 
first.
BTW, as rgl is X11 based, you need to first launch the X11 windows 
server and then try to load the rgl package.
stefano

On Feb 2, 2005, at 7:19 PM, Simone Gabbriellini wrote:

> Dear prof. Iacus,
> I'm a newbie in R, and I'm interested in rgl package, because of my
> work on social network analysis (I use sna package, but I would like to
> use rgl to plot 3D graphs).
> My problem is that I cannot find a way to load it, because the command
> library(rgl) gives me this output:
>
> Error in dyn.load(x, as.logical(local), as.logical(now)) :
> 	unable to load shared library
> "/Library/Frameworks/R.framework/Resources/library/rgl/libs/rgl.so":
>    dlcompat: dyld: /Applications/R.app/Contents/MacOS/R can't open
> library: /usr/local/lib/libpng12.0.dylib  (No such file or directory,
> errno = 2)
> Error in library(rgl) : .First.lib failed for 'rgl'
> Error in .C(symbol.C("rgl_quit"), success = FALSE, PACKAGE = "rgl") :
> 	C function name not in DLL for package rgl
>
> I try to change
>
> Sys.putenv("DYLD_LIBRARY_PATH"=gsub("/usr/X11R6/
> lib","",Sys.getenv("DYLD_LIBRARY_PATH")))
>
> in
>
> Sys.putenv("DYLD_LIBRARY_PATH"=gsub("/Library/Frameworks/R.framework/
> Versions/2.0.1/Resources/library/rgl/
> libs/","",Sys.getenv("DYLD_LIBRARY_PATH")))
>
> in rgl's .First.lib function, but still get no results. I see that the
> path it tries to follow doesn't match with the path that I use (which
> is correct), but it's the only clue I can give you.
>
> Can you help me?
>
> thank you in advance,
> Simone Gabbriellini
>
> ps: I'm having trouble also with the packages manager, which freeze R
> while it tries to load the package (I think that it's in looking for
> the documentation of the package but could not find it...)
> 	[[alternative text/enriched version deleted]]
>
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