[R] plot slow?
tlumley at u.washington.edu
Fri Oct 25 17:44:30 CEST 2002
On Thu, 24 Oct 2002, Seth Northrop wrote:
> I just installed R and am comparing it to other packages (such as Igor).
> So, you'll have to excuse me if this is a stupid question. I run the
> simple command:
> And it seems SO slow! Igor blasts through this.
It is fairly slow, but as my screen only has about a million pixels it's
unusual that I want to plot a million points on it. It's even slower (of
course) over an X-Windows link. Part of the problem is the need for a
portable interface to the graphics driver.
When it's really painfully slow is drawing a finely detailed image plot.
> My theory is that R is redrawing the screen for every point that's being
> graphed. Is it possible to control how often R redraws a plot as its
> building it - or, is there some other trick here to speeding up plots with
> lots of points?
Your theory is wrong.
There is probably room for optimisation in the graphics code, but it
isn't a terribly high priority. The main place where improvement is
planned is in the redrawing of the screen when the graphics window is
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