[R] RGui: windows-record and command history
ehlers at math.ucalgary.ca
Thu Mar 23 20:25:29 CET 2006
Duncan Murdoch wrote:
> On 3/23/2006 10:34 AM, Peter Ehlers wrote:
>> Duncan Murdoch 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.
>>> 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
>> This may be asking too much, but would it be possible to consider
>> implementing selective graph removal from the graph history?
>> I use graph.record=TRUE frequently for comparing graphs, but often
>> find that I'd like to kill one of the graphs while keeping others
>> in memory.
> That's probably not too hard to do in R code. You just need to look at
> the source in src/library/grDevices/R/windows/windows.R for the
> print.SavedPlots method, and maybe the C level code in
> src/library/grDevices/src/devWindows.c for a bit more help on the
> interpretation of the .SavedPlots object, and then it should be fairly
> straightforward to write a function that deletes an entry in the
> history. (It's a list with 5 components, the first 4 of which describe
> the current state and what the user is looking at, and the last of which
> is a list containing the actual recorded plots.)
> Duncan Murdoch
Thanks, Duncan. I'll have a look at it.
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