[R] x11() graphic device, displaying raster

[Uwe Ligges]

On 25.01.2012 15:47, Johannes Radinger wrote:
>
>>
>> On 25.01.2012 13:42, Johannes Radinger wrote:
>>>
>>>>
>>>> On 25.01.2012 12:45, Johannes Radinger wrote:
>>>>> Hello,
>>>>>
>>>>> I am wondering about the X11() graphic device on Windows.
>>>>> I try to plot a raster image but nothing gets displayed. I
>>>>> found some pages where it is mentioned that x11() not
>>>>> always supports raster rendering.
>>>>> Is there any add on for x11, any update or any R-package
>>>>> which solves that displaying problem in Windows?
>>>>>
>>>>> What I try to test it is an example from the
>>>>> package {raster}:
>>>>>
>>>>> library(raster)
>>>>> DEU_alt<- getData("alt", country="DEU", mask=TRUE)
>>>>> x11()
>>>>> plot(DEU_alt,axes=TRUE)
>>>>>
>>>>> best regards,
>>>>>
>>>>> /johannes
>>>>
>>>> Try an R version that is recent - it works for me.
>>>>
>>>> Uwe Ligges
>>>
>>> I first tried it with R 2.13.2 and raster version 1.9-64
>> (16-January-2012).
>>> Now I also installed the most recent version R 2.14.1 (Platform:
>> i386-pc-mingw32/i386 (32-bit)) and raster version 1.9-64 (16-January-2012).
>>>
>>> But in both cases no success. X11() opens and draws the axis and the
>>> border for the scale but no raster...
>>
>> I do not really understand why you are using x11(). The Windows device
>> is called windows() and you actually do not need to open it, since plot
>> opens it anyway. Or are you under cygwin (which is not really Windows)?
>> If not: Which version of Windows is this?
>
> Of course I do not need to open a graphic device (as you said it is open when calling plot). I just wanted to make it reproducable as e.g. Mac OS X opens Quartz as a standard device when calling plot on my Mac machine.
>
> So far as I understand the help are "all the devices (X11(), x11() and windows() implemented as variants of the same device". Thus it makes no difference if I call x11() or windows() or if 'plot' opens the device automatically. In all cases there is no raster displayed.
>
> Just some additional information from the 'grDevices' package:
>> library(grDevices)
>> dev.capabilities()
> $semiTransparency
> [1] TRUE
>
> $transparentBackground
> [1] "fully"
>
> $rasterImage
> [1] "yes"
>
> $capture
> [1] TRUE
>
> $locator
> [1] TRUE
>
> $events
> [1] "MouseDown" "MouseMove" "MouseUp"   "Keybd"
>
> I am running R via the standard RGUI (so no Eclipse, Rtinn etc.). The machine I am working on is Windows 2008 Server Enterprise (Version 6.0) which I am remotely accessing from a ThinClient with WindowsXP-embedded.
> This is the standard configuration of our institution. Maybe that configuration with ThinClients is a reason? But what should I ask our admin? What should he check etc?

Yes! the remotesoftware is probably unable to send the rasterimage!

See ?image:

"Problems with the rendering of raster images have been reported using 
‘windows()’ devices under Remote Desktop."

Uwe Ligges




>
> best regards,
> johannes
>
>
>
>>
>> Uwe Ligges
>>
>>
>>> There is no problem with vector graphics...like:
>>> DEU_border<- getData("GADM", country="DEU", level=1)
>>> plot(DEU_border,axes=TRUE)
>>>
>>> Any suggestions what is going on resp. how to solve it...?
>>>
>>> /johannes
>>>
>>>
>