[R] how to capture a series of plots

[Uwe Ligges]

See ?dev.copy

Uwe Ligges

Weijie Cai wrote:

> Hi, there
> 
> I am trying to capture a series of plots into jpeg or png files so that 
> I can create gif animation later. However, my plot background generation 
> is very slow, and I create the background plot only at the very 
> beginning, and at each step I only refresh the foreground points and 
> symbols like this:
> plot(x,y)
> while (condition holds){
> symbols(...add=1);
> }
> 
> My question is, can I create a series of plots test1.jpg, 
> test2.jpg...continuously? To my knowledge, R has to close current device 
> (by dev.off()) to write to current file, so once first jpeg file is 
> written, the current device with background will be off, therefore, I 
> cannot add symbols in next device and create following file series.
> 
> Any suggestions?
> 
> Thanks
> 
> WC
> 
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