That is a function I did not know about, thanks Hadley!
I still don't see the speed increase that you do with the base plot
package, but I'm sticking with ggplot anyway!
> x<-runif(1e6)
> y<-runif(1e6)
> system.time(print(qplot(x,y)))
user system elapsed
42.234 0.520 43.061
> system.time(print(qplot(x,y,pch=I('.'))))
user system elapsed
32.370 0.204 33.868
On Fri, Nov 18, 2011 at 12:39 PM, Hadley Wickham <[email protected]> wrote:
> You need: system.time(print(qplot(x,y,pch=I('.'))))
>
> Hadley
>
> On Fri, Nov 18, 2011 at 1:30 PM, Justin Haynes <[email protected]> wrote:
> > Very cool. Sadly, as far as I can tell, it doesn't work with ggplot
> though
> > :(
> >
> >
> >> x<-runif(1e6)
> >> y<-runif(1e6)
> >> system.time(plot(x,y,pch='.'))
> > user system elapsed
> > 0.824 0.012 0.845
> >> system.time(plot(x,y))
> > user system elapsed
> > 33.422 0.016 33.545
> >> system.time(print(qplot(x,y)))
> > user system elapsed
> > 45.142 0.228 45.687
> >> system.time(print(qplot(x,y,pch='.')))
> > user system elapsed
> > 47.483 1.060 49.040
> >> system.time(print(qplot(x,y,shape='.')))
> > user system elapsed
> > 44.807 0.689 45.710
> >
> >
> > On Fri, Nov 18, 2011 at 11:03 AM, Sarah Goslee <[email protected]
> >wrote:
> >
> >> Hi all,
> >>
> >> I'm working with a bunch of large graphs, and stumbled across
> >> something useful. Probably many of you know this, but I didn't and so
> >> others might benefit.
> >>
> >> Using pch="." speeds up plotting considerably over using symbols.
> >>
> >> > x <- runif(1000000)
> >> > y <- runif(1000000)
> >> > system.time(plot(x, y, pch="."))
> >> user system elapsed
> >> 1.042 0.030 1.077
> >> > system.time(plot(x, y))
> >> user system elapsed
> >> 37.865 0.033 38.122
> >>
> >> If you have enough points, the result is also more legible.
> >>
> >> Choice of which pch symbol makes a difference too, the default pch=1
> being
> >> the slowest of what I tried, but "." is by far the speediest.
> >>
> >> > system.time(plot(x, y, pch=0))
> >> user system elapsed
> >> 11.191 0.011 11.270
> >> > system.time(plot(x, y, pch=1))
> >> user system elapsed
> >> 38.024 0.008 38.245
> >> > system.time(plot(x, y, pch=2))
> >> user system elapsed
> >> 14.140 0.027 14.270
> >> > system.time(plot(x, y, pch=3))
> >> user system elapsed
> >> 15.696 0.011 15.799
> >> > system.time(plot(x, y, pch=4))
> >> user system elapsed
> >> 18.770 0.007 18.888
> >>
> >> This is a vanilla R session, 2.13.1 for x86_64-redhat-linux-gnu. I
> >> haven't tried it on any other OS, but it's making my life a lot
> >> smoother right now.
> >>
> >> Sarah
> >>
> >> --
> >> Sarah Goslee
> >> http://www.functionaldiversity.org
> >>
> >> ______________________________________________
> >> [email protected] mailing list
> >> https://stat.ethz.ch/mailman/listinfo/r-help
> >> PLEASE do read the posting guide
> >> http://www.R-project.org/posting-guide.html
> >> and provide commented, minimal, self-contained, reproducible code.
> >>
> >
> > [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > [email protected] mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
> >
>
>
>
> --
> Assistant Professor / Dobelman Family Junior Chair
> Department of Statistics / Rice University
> http://had.co.nz/
>
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