R help - Oct 2003 - dev.print in R 1.7.1

Dear R experts

 

How do I save a plot to a file in a specified format, f.ex ’png’?

 

Apparently ’save.plot’ no longer exists, so I tried instead

 

dev.print(file="H:\\jesperf\\data1image",device=png())

 

However no file is created and – much worse – no graphics is produced
(on screen or file) if I run

f.ex qqnorm afterwards.

 

What am I doing wrong and how do I get R to print graphics on the screen
as ususal?

 

Thanks in advance for your help.

 

Kim.

 

------------

Kim Mouridsen

M.Sc., Ph.D student

Center for Functionally Integrative Neuroscience (CFIN)

Århus University Hospital

Nørrebrogade 44 Building 30, 1.

DK-8000 Århus C, Denmark

Phone +45 8949 4099

FAX +45 8949 4400

 


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I can't help you with 1.7.1: it is obselete.  But since you are apparently
using Windows, there are menus in 1.8.0 to do what you want, as well as
the command savePlot() (AFAIK there never was a function save.plot).

On Mon, 20 Oct 2003, Kim Mouridsen wrote:
> Dear R experts
> 
>  
> 
> How do I save a plot to a file in a specified format, f.ex ?png??
> 
>  
> 
> Apparently ?save.plot? no longer exists, so I tried instead
> 
>  
> 
> dev.print(file="H:\\jesperf\\data1image",device=png())
That should be device=png, not png(), as the help page says.
> However no file is created and ? much worse ? no graphics is produced
> (on screen or file) if I run
> 
> f.ex qqnorm afterwards.
Try dev.list() and dev.off()?
> What am I doing wrong and how do I get R to print graphics on the screen
> as ususal?
-- 
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

Prof Brian Ripley <ripley at stats.ox.ac.uk> wrote:
	(AFAIK there never was a function save.plot).
	
In R 1.7.1 ?save.plot does in fact list save.plot among the ?Defunct
functions.  In the text, it says

     The new function `dev.print()' should now be used for saving plots
     to a file or printing them.

?dev.print explains
  device: A device function (e.g., `x11', `postscript', ...)
which unfortunately suggests that the argument should be a string,
but the example
     dev.print(device=postscript, ...)
makes all clear.

R on-line documentation is really _very_ good.