[R] How to restore and edit saved graphics?

[Paul Murrell]

Hi


Shin, Daehyok wrote:
> Thanks for the interesting solution.
> I am happy to find a way to save all graphic options into a file.
> There is a minor glitch.
> Is there is any way to replace title, not to overwrite it?
> And if I want to change the color of a line or the ranges of x or y axis,
> how can I do it with the restored plot?


The grid graphics package provides support for this sort of thing.  If 
you have R 1.9.0 there are some vignettes describing grid and how to do 
this sort of thing in grid -- see vignette("grid") and 
vignette("interactive") for a start.

This may or may not be sufficient for your purposes right now -- grid 
doesn't give you any high-level plots and, although the lattice package 
does give you high-level plots, it doesn't make use of the bits of grid 
that would allow this sort of interaction just yet (we're working on it) 
-- so its immediate usefulness will depend on what you're trying to do.

Paul


> Interestingly, there is no mention about  dev.control() in the help document
> of recordPlot(). I think it should be there.
> 
> Thanks again.
> 
> Daehyok Shin (Peter)
> 
> 
>>-----Original Message-----
>>From: r-help-bounces at stat.math.ethz.ch
>>[mailto:r-help-bounces at stat.math.ethz.ch]On Behalf Of Gabor Grothendieck
>>Sent: Saturday, May 15, 2004 PM 11:59
>>To: r-help at stat.math.ethz.ch
>>Subject: Re: [R] How to restore and edit saved graphics?
>>
>>
>>Saving of the low level graphics that R displays can be
>>1. turned on with dev.control(displaylist="enable") and
>>2. turned off with dev.control(displaylist="inhibit").
>>recordPlot() can be used to save the display list in a variable.
>>
>>For example:
>>
>># turn on display list, perform plot, turn off display list, add title
>># do not need next line if graphics device already active
>>windows()  # or x11() on unix
>>dev.control(displaylist="enable")
>>plot(1:10)
>>myplot <- recordPlot()
>>dev.control(displaylist="inhibit")
>>title(main="My Title")
>>
>># now redisplay plot as it was before title and reissue title
>>myplot
>>title(main="My Other Title")
>>
>>Shin <sdhyok <at> email.unc.edu> writes:
>>
>>:
>>: I am looking for a function to restore saved graphics for further
>>: editing, such as changing its title, labels, or legend.
>>: How can I do it in R? Thanks in advance.
>>:
>>
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>>http://www.R-project.org/posting-guide.html
> 
> 
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-- 
Dr Paul Murrell
Department of Statistics
The University of Auckland
Private Bag 92019
Auckland
New Zealand
64 9 3737599 x85392
paul at stat.auckland.ac.nz
http://www.stat.auckland.ac.nz/~paul/