[R] Plot availability

[hadley wickham]

I really would encourage you to look at ggplot2 before trying to
create something of your own.  Your example would convert to the
following ggplot2 code:

df <- data.frame(x = 0:3, y = 3:0)

plot <- ggplot() + xlim(-3, 3) + ylim(-3, 3) + opts(main = "Hello World")
plot + geom_line(aes(x=x, y=y), df, colour = "blue")

Hadley

On Fri, Sep 19, 2008 at 1:44 PM, john crepezzi <seejohnrun at gmail.com> wrote:
> I believe I've found a way to wrap and use dev.cur()[[1]] to have the
> desired effect.  I'm just leaving my terminal now, but I'll post these
> results on monday so everyone can see how it turned out.
>
> If you have any ideas or qualms with this method, please let me
> know.
>
> Thanks Duncan!
> --john
>
> On Sep 19, 2:00 pm, john crepezzi <seejohn... at gmail.com> wrote:
>> I'm not so sure the original way I stated my issue was clear enough,
>> so I'll attempt to elaborate a little bit.
>>
>> I'd like to make a function that is passed the name of a plot object,
>> and a lines/point specification, and graphs them all on the same plot.
>>
>> I don't want to redraw the plot each time, and I don't want the code
>> to have any concept of a "first entry" instantiating the plot with
>> plot() in place of lines().
>>
>> Ideally, I'd like something to the effect of:
>>
>> plot <- createPlot(main = "Hello World", sub = "tiny, little world",
>> xlim = c(-3, 3), ylim = c(-3, 3))
>>
>> plot <- addElement(plot, lines(col = 'BLUE', x = c(0, 1, 2, 3), y =
>> c(3, 2, 1, 0)))
>>
>> Hopefully this laid my problem out a little better.
>>
>> Thanks in advance for any help you might be able to offer
>> -John Crepezzi
>>
>> On Sep 19, 10:11 am, Duncan Murdoch <murd... at stats.uwo.ca> wrote:
>>
>> > On 9/19/2008 9:32 AM, john crepezzi wrote:
>>
>> > > Is it possible to see if a plot is already open before I call lines()?
>>
>> > I don't think so.  You can see if a graphics device is open by looking
>> > at dev.cur(), but I don't think there's a test for plot.new().  I'd just
>> > wrap the call in try() if you're not sure it will work.
>>
>> > Duncan Murdoch
>>
>> > ______________________________________________
>> > R-h... at r-project.org mailing listhttps://stat.ethz.ch/mailman/listinfo/r-help
>> > PLEASE do read the posting guidehttp://www.R-project.org/posting-guide.html
>> > and provide commented, minimal, self-contained, reproducible code.
>>
>> ______________________________________________
>> R-h... at r-project.org mailing listhttps://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guidehttp://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>



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