Unfortunately the Tcl/Tk situation is somewhat of a zoo on OS X.
OS X comes with a native (Aqua) version pre-installed, which includes
bwidget and tktable. See /System/Libraries/Tcl. If you build
you own Terminal or Emacs version of R, then the build
process finds this Tcl/Tk and uses it. This has the additional
benefit that loading the package tcltk gives you an event loop
that can be used for interacting with the quartz windows. Basically
R thinks it is a Wish application. You will see that loading
tcltk opens a generic R application in the dock, and gives R
its own Wish based menu bar (which is pretty useless).

On the other hand, using the Aqua Tcl/Tk seriously confuses the R  
GUI, which
assumes you use the X11 version of Tcl/Tk. So if you want to use the
R GUI and can stand to look at X11 widgets, you have to build your
own Tcl/Tk (or get the one from CRAN) and then build X11 versions
of the extensions (make sure that tclConfig and tkConfig are in
/usr/local/bin and that /usr/local/bin is early in your $PATH --
and do try to stay away from fink and/or darwinports i.e. from
/sw and /opt).


On Nov 3, 2005, at 8:53 , Rob J Goedman wrote:

> Sokol,
>
> Unfortunately I have never used limmaGUI nor tried to install the  
> extension
> widget on Mac OS.
>
> Maybe Jan has looked at/tried these (I've taken the liberty to cc  
> Jan).
>
> I've had more questions about these, so would be interested in the
> outcome. Right now I'm struggling with ggobi on Mac OS :-) to help
> someone else out!
>
> Rob
>
>
> On Nov 2, 2005, at 1:17 PM, Sokol Haxhinasto wrote:
>
>> Dear Rob,
>>
>> I have been trying to run limmaGUI on my mac.
>> I am able to install it, however, when I run it, it gives the  
>> following error about tcltk extensions
>>
>> Any advice?
>>
>> "Tcl/Tk Extension(s) Not Found"-
>>
>> limmaGUI requires the Tcl/Tk extensions, BWidget and Tktable.
>> You must have Tcl/Tk installed on your computer, not just the minimal
>> Tcl/Tk installation which comes with R (for Windows).  If you do have
>> Tcl/Tk installed, including the extensions (e.g. using the ActiveTcl
>> distribution in Windows), make sure that R can find the path to  
>> the Tcl
>> library, e.g. C:\Tcl\lib (on Windows) or /usr/lib (on Linux/Unix) or
>> /sw/lib on Mac OSX.
>>
>> If you don't know how to set environment variables in Windows, one  
>> way to
>> make sure that R can find the Tcl/Tk extensions Tktable2.8 and  
>> bwidget1.6
>> is to copy them from your ActiveTcl installation e.g. in C:\Tcl 
>> \lib into
>> the Tcl subdirectory of your R installation.
>> If you do understand how to set environment variables... make sure  
>> that you
>> have the TCL_LIBRARY environment variable set to the appropriate  
>> path,
>> e.g.C:\Tcl\lib\tcl8.4 and the MY_TCLTK environment variable set to a
>> non-empty string, e.g. "Yes".
>>
>> If using Windows, be sure to read the R for windows FAQ at
>> http://www.stats.ox.ac.uk/pub/R/rw-FAQ.html
>>
>> If your Tcl/Tk extensions still can't be found, try addTclPath 
>> ("<path to
>> Tcl library>"). This could be put in $HOME/.Rprofile
>>
>> If you need further instructions, please contact your system  
>> administrator
>> and consider emailing r-help at stat.math.ethz.ch, or browse  
>> through the
>> R-help archives for a similar question.
>>
>> The URLs for Tktable and BWidget are:
>> http://tktable.sourceforge.net
>> http://tcllib.sourceforge.net
>

===
Jan de Leeuw; Distinguished Professor and Chair, UCLA Department of  
Statistics;
Editor: Journal of Multivariate Analysis, Journal of Statistical  
Software
US mail: 8130 Math Sciences Bldg, Box 951554, Los Angeles, CA 90095-1554
phone (310)-825-9550;  fax (310)-206-5658;  email: deleeuw@stat.ucla.edu
.mac: jdeleeuw ++++++  aim: deleeuwjan ++++++ skype: j_deleeuw
homepages: http://gifi.stat.ucla.edu ++++++ http://www.cuddyvalley.org
   
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           No matter where you go, there you are. --- Buckaroo Banzai
                    http://gifi.stat.ucla.edu/sounds/nomatter.au
   
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