[R] ggobi install

[Mark Ungrin]

hi - not sure if this is the right spot to ask for help on this, 
probably a basic question...

I am trying to install ggobi on R running on Ubuntu Hardy - I am new to 
both Linux & R so the answer may be obvious & I'm just missing it. I 
have installed GGobi via synaptic, but trying to install rggobi I get 
the following error - there's some path problem but I don't fully 
understand the error message:

> > install.packages("rggobi")
> Warning in install.packages("rggobi") :
> argument 'lib' is missing: using 
> '/home/mark/R/i486-pc-linux-gnu-library/2.6'
> also installing the dependency ‘RGtk2’
>
> trying URL 'http://probability.ca/cran/src/contrib/RGtk2_2.12.8.tar.gz'
> Content type 'application/x-gzip' length 2169982 bytes (2.1 Mb)
> opened URL
> ==================================================
> downloaded 2.1 Mb
>
> trying URL 'http://probability.ca/cran/src/contrib/rggobi_2.1.10.tar.gz'
> Content type 'application/x-gzip' length 133907 bytes (130 Kb)
> opened URL
> ==================================================
> downloaded 130 Kb
>
> * Installing *source* package 'RGtk2' ...
> checking for pkg-config... /usr/bin/pkg-config
> checking pkg-config is at least version 0.9.0... yes
> checking for LIBGLADE... no
> configure: WARNING: libglade not found
> checking for INTROSPECTION... no
> checking for GTK... no
> configure: error: GTK version 2.8.0 required
> ERROR: configuration failed for package 'RGtk2'
> ** Removing '/home/mark/R/i486-pc-linux-gnu-library/2.6/RGtk2'
> * Installing *source* package 'rggobi' ...
> checking for pkg-config... /usr/bin/pkg-config
> checking pkg-config is at least version 0.9.0... yes
> checking for GGOBI... configure: error: Package requirements (ggobi >= 
> 2.1.6) were not met:
>
> Package gtk+-2.0 was not found in the pkg-config search path.
> Perhaps you should add the directory containing `gtk+-2.0.pc'
> to the PKG_CONFIG_PATH environment variable
> Package 'gtk+-2.0', required by 'libggobi', not found
>
> Consider adjusting the PKG_CONFIG_PATH environment variable if you
> installed software in a non-standard prefix.
>
> Alternatively, you may set the environment variables GGOBI_CFLAGS
> and GGOBI_LIBS to avoid the need to call pkg-config.
> See the pkg-config man page for more details.
>
> ERROR: configuration failed for package 'rggobi'
> ** Removing '/home/mark/R/i486-pc-linux-gnu-library/2.6/rggobi'
>
> The downloaded packages are in
> /tmp/RtmpLbLLyB/downloaded_packages
> Warning messages:
> 1: In install.packages("rggobi") :
> installation of package 'RGtk2' had non-zero exit status
> 2: In install.packages("rggobi") :
> installation of package 'rggobi' had non-zero exit status
> > 
please let me know

thanks!

Mark

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