[R] the huge postscript plot
Liaw, Andy
andy_liaw at merck.com
Mon Jul 7 14:24:12 CEST 2003
The sunflowerplot function in base, or the hexbin package in Bioconductor,
could possibly be useful for this.
Andy
> -----Original Message-----
> From: Yongchao Ge [mailto:gyc at stat.berkeley.edu]
> Sent: Saturday, July 05, 2003 3:06 AM
> To: r-help at stat.math.ethz.ch
> Subject: RE: [R] the huge postscript plot
>
>
> Hi Matt,
>
> Thanks for the help. I'm just wondering if some package or
> some options in par or ps.options exists so that I can just
> use it directly. As we know, we can not just randomly sample
> 1000 of them as we may miss some important extreme points
> (outliers). We need to define a small distance d, when a
> clouds of points are within the distance of d, then we can
> randomly sample a few points from each clouds so we don't
> lose any visual information. What it really needs is a fast
> algorithm to group 60,000 points into 1000+ of clusters. Each
> cluster's radius must be less than d.
>
> We can surely work this way. Again, let's go back to my
> original question, I'd like to find a fast way to plot the
> points into a bitmapped (raster) format, say 600x800. This is
> just an informal way of the sampling strategy defined in the
> first graph and the radius d is defined by the dimension size
> of the plot (600x800). The larger dimension size, the
> smaller the radius d is.
>
> If such package or options exists in R, please let me know as
> it can save me enormous of time for the programming.
>
> Yongchao
>
>
> On Fri, 4 Jul 2003, Wiener, Matthew wrote:
>
> > One possibility is to sample your 60,000 points, since you probably
> > can't see them all distinctly anyway. You could sample,
> say, 10000 of
> > them.
> >
> > Hope this helps,
> >
> > Matt Wiener
> >
> > -----Original Message-----
> > From: Yongchao Ge [mailto:gyc at stat.berkeley.edu]
> > Sent: Friday, July 04, 2003 7:06 PM
> > To: r-help at stat.math.ethz.ch
> > Subject: [R] the huge postscript plot
> >
> >
> > Hi,
> >
> > I'm just wondering how I can do to make a huge postscript plot be
> > manageable. My question is that I have to draw around 60,000 points
> > which makes it painfully slow to print or view in gv or put it into
> > latex document, though it is very fast to produce the
> postscript file.
> >
> > A simple example is in the attachment.
> >
> > Well, I found that if I use png or jpeg. It is much faster
> to view the
> > figure. The only problem is that the x label, y label are using
> > bitmapped font so it doesn't look as beautiful as postscript.
> > Sometimes it is just hard to read the legend which consists of
> > information how to interpret the figure.
> >
> > My question is that if there are some options or packages such that
> > when we are plotting many points or lines, the plot uses
> the bitmapped
> > (raster) format, but for the characters, like the x label, y label,
> > and the title, it uses the native font.
> >
> > pdf seems use the above approach and is very fast, but I
> have to use
> > pdf2ps to convert the pdf file to ps file. It is still slow. If you
> > know other good converter of pdf file to ps file, i will also very
> > appreciate it.
> >
> >
> > Thanks,
> >
> > Yongchao
> >
> > x<-1:2000
> > y<-matrix(rnorm(2000*12),2000,12)
> > for(i in 1:12){
> > y[,i]<-sort(y[,i]+i*0.5)
> > }
> > postscript("try.ps")
> > matplot(x,y,type="l",lwd=5)
> > dev.off()
> >
> > ______________________________________________
> > R-help at stat.math.ethz.ch mailing list
> > https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> >
> >
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