[R] one problem about how to hold graphic with R

[Gavin Simpson]

On Tue, 2006-10-31 at 21:36 +0800, yang baohua wrote:
> Sorry to disturb you, but can you help me to solve one little problem?
> I want to draw a graphic after another with R
> but I cannot find the first one after that.
> Do you know the command to hold the graphic with R?
> I remember with Matlab you may use "hold on".
> Thanks.
> 
> 

You don't say which OS. On MS Windows one can turn on a history of plots
to the graphics device and replay your plots - it is in the menu bar for
example.

In all OSes, you can start up a new device to take the plot - which is
what Matlab does IIRC, so you have two or more plot windows on screen at
any one time. This is done like this:

plot(1:10)
x11()
plot(1:20)
x11()
plot(rnorm(100))

see ?Devices

You can set a device to be active, i.e. switch around between plotting
windows using dev.set(), e.g.:

> dev.cur() # example from above leaves device 4 active
X11
  4
> dev.set(3) # switch to device
> dev.cur() # check
X11
  3
> plot(sort(rnorm(100))) # plot something new on this device

Is this what you were looking for?

HTH

G
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