[R] warning In fun(...) : no DISPLAY variable so Tk is not available

[Duncan Murdoch]

Nevil Amos wrote:
> I am getting the above warning following loading of Geneland 3.1.5 on 
> unix , while a simple plot sends output to the pdf file ( see attached 
> code) no output results from Geneland functions, resulting in empty pdf 
> files
>   

That message is saying it can't find an X11 server for Tcltk to use.  If 
you do have X11 available, then just set the DISPLAY environment 
variable in the normal way; if you don't, then you're not going to be 
able to use that package on Unix.  (The Windows implementation is 
self-contained, so it should work there.)

Duncan Murdoch
>
>  > library (Geneland)
> Loading required package: RandomFields
> Loading required package: fields
> Loading required package: spam
> Package 'spam' is loaded. Spam version 0.21-0 (2010-03-13).
> Type demo( spam) for some demos, help( Spam) for an overview
> of this package.
> Help for individual functions is optained by adding the
> suffix '.spam' to the function name, e.g. 'help(chol.spam)'.
>
> Attaching package: 'spam'
>
> The following object(s) are masked from 'package:base':
>
>      backsolve, forwardsolve, norm
>
>   Try help(fields) for an overview of this library
> fields web: http://www.image.ucar.edu/Software/Fields
> Loading required package: mapproj
> Loading required package: maps
> Loading required package: snow
> Loading required package: tcltk
> Loading Tcl/Tk interface ... done
> ooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo
> o        Geneland is loaded                                       o
> o                                                                 o
> o                * Please *                                       o
> o                                                                 o
> o        Register on                                              o
> o        http://folk.uio.no/gillesg/Geneland/register.php         o
> o                                                                 o
> o        See manual on                                            o
> o        http://folk.uio.no/gillesg/Geneland/Geneland.html        o
> o                                                                 o
> o        This is Geneland-3.1.5                                   o
> o                                                                 o
> ooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo
> Warning message:
> In fun(...) : no DISPLAY variable so Tk is not available
>  > pdf("test.pdf")
>  > plot(1:10,1:10)
>  > dev.off()
> null device
>
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