Hi
Take a look at dev.hold() and dev.flush()
Paul
On 23/03/24 06:43, Bickis, Mikelis wrote:
Hello:
I want to present a sequence of plots as an animation. As a toy example
consider the code
function(n){for (i in 1:n){
plot(1:100,sin(i*(1:100)),type="l")
title(paste("n=",i))
segments(0,0,100,0,col=2)
}}
This sort-of works on a MacOS platform, but the rendering of the plots
is a bit choppy. Inserting a sleep function allows the plots to evolve
smoothly.
function(n){for (i in 1:n){
plot(1:100,sin(i*(1:100)),type="l")
title(paste("n=",i))
segments(0,0,100,0,col=2)
Sys.sleep(.2)
}}
However, on a Windows platform, only the last plot is rendered without
the Sys.sleep, so the dynamic element is lost. Inserting the Sys.sleep
does allow all the plots to be rendered, but they seem to be erased
before they are drawn again, so there is substantial flicker in the
appearance.
Is there some kind of double-buffering available within R, so that plots
are rendered only after they are fully drawn, leaving the previous plot
visible until it is replaced? I just used the default graphics driver on
Windows — is there perhaps a different driver that will the graphics
smoother?
Mik Bickis
Professor Emeritus
Department of Mathematics and Statistics
University of Saskatchewan
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Dr Paul Murrell (he/him)
Te Kura Tatauranga | Department of Statistics
Waipapa Taumata Rau | The University of Auckland
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www.stat.auckland.ac.nz/~paul/
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