[R] png(): Linux vs Windows

[Prof Brian Ripley]

On Sun, 12 Oct 2008, Ted.Harding at manchester.ac.uk wrote:

> On 12-Oct-08 22:09:46, jim holtman wrote:
>> Seem to work fine on my R 2.7.2 version of Windows:
>>
>>> png(file="myplot.png", bg="transparent", units='cm',
>>> width=12,height=15, res=200)
>>> plot(1:10)
>>> rect(1, 5, 3, 7, col="white")
>>> dev.off()
>>
>> Did you check the version they are using.
>
> Hi Jim,
> Thanks! I've now learned that it is R 2.5.1 (which I see
> is from June 2007).
> Ted.

This difference *is* the version of R, not 'Linux vs Windows'.
The NEWS for 2.6.0 says

     o	jpeg(), png(), bmp() (Windows), dev2bitmap() and bitmap() have
 	a new argument 'units' to specify the units of 'width' and
 	'height'.

(that is something you could have checked without access to R under 
Windows).

>
>
>>
>> On Sun, Oct 12, 2008 at 6:02 PM, Ted Harding
>> <Ted.Harding at manchester.ac.uk> wrote:
>>> Hi Folks,
>>> Quick question. I have the following line in an R code file
>>> which runs fine on Linux:
>>>
>>> if(PNG) png(GraphName,width=12,height=15,units="cm",res=200)
>>>
>>> I learn that, when the same code was run on a Windows machine,
>>> there was the following error:
>>>
>>> Error in png(GraphName,width=12,height=15,units="cm",res=200):
>>>        unused argument(s) (units = "cm")
>>>
>>> Sorry to be a bother -- but could a Windows Ruser put me wise
>>> on any differences between png() on Windows and Linux?
>>>
>>> (And, sorry, I don't know what version of R, nor what version
>>> of Windows, this occurred on).
>>>
>>> Thanks,
>>> Ted.
>>>
>>> --------------------------------------------------------------------
>>> E-Mail: (Ted Harding) <Ted.Harding at manchester.ac.uk>
>>> Fax-to-email: +44 (0)870 094 0861
>>> Date: 12-Oct-08                                       Time: 23:02:41
>>> ------------------------------ XFMail ------------------------------
>>>
>>> ______________________________________________
>>> R-help at r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>> PLEASE do read the posting guide
>>> http://www.R-project.org/posting-guide.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>>
>>
>>
>>
>> --
>> Jim Holtman
>> Cincinnati, OH
>> +1 513 646 9390
>>
>> What is the problem that you are trying to solve?
>>
>> ______________________________________________
>> R-help at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
> --------------------------------------------------------------------
> E-Mail: (Ted Harding) <Ted.Harding at manchester.ac.uk>
> Fax-to-email: +44 (0)870 094 0861
> Date: 12-Oct-08                                       Time: 23:24:21
> ------------------------------ XFMail ------------------------------
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595