On Fri, 27 Feb 2004, Deepayan Sarkar wrote: > On Friday 27 February 2004 01:22, Prof Brian Ripley wrote: > > On Thu, 26 Feb 2004, Deepayan Sarkar wrote: > > > On Thursday 26 February 2004 14:47, Rajarshi Guha wrote: > > > > Hi I had two questions regarding plots: > > > > > > > > * Is there are way to save a plot in the form of an object such that > > > > it could be displayed/modified later? > > > > > > Depends on what you want to do. Probably not for regular (base) plots. > > > > I think ?recordPlot does this, at least to allow plots to be saved, > > displayed again and added to. > > Ah, I didn't know that. > > > > The > > > grid package has a concept of objects that can be edited (before > > > and/or after plotting them). Functions in the lattice package produce > > > objects that may be close to what you want. They are not plots > > > themselves, but rather a self-contained description of a plot (in the > > > sense that they contain the data as well as instructions on how to > > > plot it). The data part cannot be easily changed, but almost > > > everything else can be manipulated before plotting. > > > > AFAIK that internal description is not documented and there are no > > end-user tools for doing the manipulation. Can you please point us to > > details? I suspect nothing can _easily_ be changed by end-users at > > present. > > > There has always been an update() method that's supposed to be used for > this. No one uses it much, and it probably has a few bugs (but should be > improved in time for R 1.9.0). From ?xyplot: > > Value: > > An object of class ``trellis''. The `update' method can be used to > update components of the object and the `print' method (usually > called by default) will plot it on an appropriate plotting device.
Ah, I see. It cannot change the panel function, for example, indeed none of the things I was thinking about. I had thought update() recalculated the plot, so I've learned something, thank you. -- Brian D. Ripley, [EMAIL PROTECTED] 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 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
