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:[EMAIL PROTECTED] > Sent: Friday, July 04, 2003 7:06 PM > To: [EMAIL PROTECTED] > 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() > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://www.stat.math.ethz.ch/mailman/listinfo/r-help > > ------------------------------------------------------------------------------ > Notice: This e-mail message, together with any attachments, contains > information of Merck & Co., Inc. (Whitehouse Station, New Jersey, > USA) that may be confidential, proprietary copyrighted and/or legally > privileged, and is intended solely for the use of the individual or entity > named on this message. If you are not the intended recipient, and > have received this message in error, please immediately return this by > e-mail and then delete it. > ------------------------------------------------------------------------------ > ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
