Hi
Michael H. Prager wrote: > > on 3/23/2006 2:42 PM Paul Murrell said the following: > >>Hi >> >> >>Duncan Murdoch wrote: >> >> >>>On 3/23/2006 10:46 AM, Gabor Grothendieck wrote: >>> >>> >>> >>>>On 3/23/06, Duncan Murdoch <[EMAIL PROTECTED]> wrote: >>>> >>>> >>>> >>>>>On 3/23/2006 10:29 AM, Gabor Grothendieck wrote: >>>>> >>>>> >>>>> >>>>>>On 3/23/06, Duncan Murdoch <[EMAIL PROTECTED]> wrote: >>>>>> >>>>>> >>>>>> >>>>>>>On 3/23/2006 7:35 AM, Thomas Steiner wrote: >>>>>>> >>>>>>> >>>>>>> >>>>>>>>a) How can I set the recording of all windows()-history forever to >>>>>>>>"true"? I want something like windows(record = TRUE) but not just for >>>>>>>>the window that opens then, but for all windows I will open ever. >>>>>>>> >>>>>>> >>>>>>>options(graphics.record=TRUE) >>>>>>> >>>>>>>will make that happen for the rest of the session. To really make it >>>>>>>happen forever, you need to put this line in your Rprofile (see >>>>>>>?Rprofile for where that comes from). >>>>>>> >>>>>>>Watch out though: the graphics history is stored in your current >>>>>>>workspace in memory, and it can get big. You might find you're running >>>>>>>out of memory if you store everything, and you'll find your .RData files >>>>>>>quite large if you save your workspace. >>>>>>> >>>>>>>On my todo list (but not for 2.3.0) is the possibility of setting a >>>>>>>default history length, perhaps defaulting to saving the last 2 or 3 >>>>>>>pages. >>>>>>> >>>>>> >>>>>>Would it be feasible to have history on disk or perhaps the last >>>>>>m in memory and the last n (possibly Inf) on disk? >>>>>> >>>>> >>>>>The history is just another R object. Saving big R objects on disk >>>>>might be desirable, but it would be a big change, so I'd call it >>>>>infeasible. I wouldn't want to get into special-casing this particular >>>>>R object: that way lies madness. >>>>> >>>>>However, since it is just an R object, it's available for R code to work >>>>>with, so someone who was interested in doing this could write a >>>>>contributed package that did it. >>>>> >>>> >>>>Are there R-level facilities to manipulate the history, not >>>>just the top? >>>> >>> >>>Sure, it's a regular R object. You will need to read the source to know >>>how to interpret it, and since it's undocumented there's a risk of >>>changes in future R versions, but it's not very complicated. See my >>>message to Peter. >>> >> >> >>Be careful with this. The objects that are recorded on the display list >>are calls to graphics functions PLUS state information in a raw binary >>format. The display list was originally intended for reuse within the >>same R session (for redrawing the screen). If you try to save it and >>use it between sessions or (worse) between versions of R you could run >>into some nasty problems. For example, what if the graphics function >>interface has changed? what if the raw binary state information format >>has changed? what if the required packages are not installed? At >>best, your saved object produces errors; at worst it becomes completely >>useless and is unrecoverable. >> >>Paul >> > > > > For that reason, there could be some benefit in saving desired graphics > externally as files -- under Windows, savePlot() can be used -- and > starting with a fresh graphics history in each R session. > > I regularly use the R command > > .SavedPlots <- NULL > > in scripts to get rid of any old history. This seems to work fine, but > of course I would appreciate comments from those more knowledgeable > telling me what's wrong with it. FWIW, my recommendation would be to use R code as the primary storage format. It's useful to have the plot as a PDF or WMF file, but if you ever need to change anything, you need the original R code. Of course, this means you need to keep the underlying data, and possibly analysis code as well, but you should be doing that anyway. Paul -- Dr Paul Murrell Department of Statistics The University of Auckland Private Bag 92019 Auckland New Zealand 64 9 3737599 x85392 [EMAIL PROTECTED] http://www.stat.auckland.ac.nz/~paul/ ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
