Message-ID: <48DA4C8A.2050506@imperial.ac.uk>
Date: 2008-09-24T14:19:54Z
From: Adaikalavan Ramasamy
Subject: Changing a plot
In-Reply-To: <c84ed6950809240523k768b46cfub502c909d18dc481@mail.gmail.com>
One way is to keep a copy of the original and then return to it when you
need it.
x <- rnorm(100,1,0.5)
y <- rnorm(100,1,0.5)
plot(x,y,pch=16)
original <- recordPlot()
for( i in 1:10 ){
points( x[i], y[i], pch=19, col="yellow", cex=3)
points( x[i], y[i], pch=16)
Sys.sleep(1) # slow the graphs a bit
replayPlot(original)
}
Regards, Adai
R Help wrote:
> Hello list,
>
> I've been working on this problem for a while and I haven't been able
> to come up with a solution.
>
> I have a couple of functions that plot a bunch of data, then a single
> point on top of it. What I want is to be able to change the plot of
> the point without replotting all the data. Consider the following
> example:
>
> x = rnorm(100,1,0.5)
> y = rnorm(100,1,0.5)
> plot(x,y,pch=16)
> points(x[35],y[35],pch=19,col=6,cex=3)
>
> What I want to be able to do is to change the purple point to a
> different value without replotting everything.
>
> I know this seems like an odd suggestion, but it comes up a lot with
> the work I'm doing. I've prepared a package on CRAN called
> ResearchMethods for a course I'm working on, and there are several
> functions in there who's GUIs could work better if I could figure this
> out.
>
> If anyone has any ideas, or needs some further explanation, feel free
> to contact me.
>
> Thanks a lot,
> Sam Stewart
>
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