Always provide sessionInfo() and traceback() when reporting errors. /Henrik
On Mon, Apr 12, 2010 at 8:34 AM, Mao Jianfeng <jianfeng.mao at gmail.com>
wrote:> Dear R-helpers
>
> I want to express my respect and thankfulness to all of you.
>
> I just switch from windows xp to Ubuntu linux platform. I am facing
> two problems when I run R in Ubuntu.
>
> I need your helps and advice, thanks in advance.
>
>
-----------------------------------------------------------------------------------------------------------------------------------------------------------
> 1. JGR() can not be loaded in R session properly
>
> when I load JGR package in R, I got:
>
----------------------------------------------------------------------------------------------
>> library(JGR)
> Loading required package: rJava
> Loading required package: JavaGD
> Loading required package: iplots
> Error in .jnew("org/rosuda/iplots/Framework") :
> ?java.awt.AWTError: Cannot load AWT toolkit:
gnu.java.awt.peer.gtk.GtkToolkit
> Error: package 'iplots' could not be loaded
>
> note: Tcl/Tk interface can be loaded by R automatically.
>
> Loading Tcl/Tk interface ... done
>
>
----------------------------------------------------------------------------------------------------------------------------------------------------------
> 2. demo() just can return a blank window-board
>
> when I execute demo(graphics) and hit <Return>, I just got a blank
prompt.
>
-----------------------------------------------------------------------------------------------
>> demo(graphics)
>
>
> ? ? ? ?demo(graphics)
> ? ? ? ?---- ~~~~~~~~
>
> Type ?<Return> ? to start :
>
>> require(datasets)
>
>> require(grDevices); require(graphics)
>
>> ## Here is some code which illustrates some of the differences between
>> ## R and S graphics capabilities. ?Note that colors are generally
specified
>> ## by a character string name (taken from the X11 rgb.txt file) and
that line
>> ## textures are given similarly. ?The parameter "bg" sets the
background
>> ## parameter for the plot and there is also an "fg" parameter
which sets
>> ## the foreground color.
>>
>>
>> x <- stats::rnorm(50)
>
>> opar <- par(bg = "white")
>
>> plot(x, ann = FALSE, type = "n")
> Hit <Return> to see next plot:
> Error in plot.new() : attempt to plot on null device
>
-------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Yours,
>
> Jian-Feng, Mao
> the Institute of Botany, CAS
> Beijing, China
>
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>