From: Kerry Bush <kerryrekky_at_yahoo.com>

Date: Tue 09 Aug 2005 - 06:42:08 EST

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Tue Aug 09 06:45:49 2005

Date: Tue 09 Aug 2005 - 06:42:08 EST

Thank you.

But I only need three classes of freqnencies (in another words, only three kinds of symbols) for 1-5, 5-10 and above 10, not to use different symbols for different frequencies. Otherwise, clearly R will run out of available symbols and the plot is also hard to view.

Thank you anyway.

- Adaikalavan Ramasamy <ramasamy@cancer.org.uk> wrote:

> Group by which variable ? If you mean the joint

*> distribution of 'x' and
**> 'y' then something along the following lines
**>
**> x <- rep( c(0.1, 0.2, 0.4, 0.5), c(5, 6, 10,
**> 20) )
**> y <- rep( c(0.5, 0.6, 1.2, 2.5, 3.0), c(3, 8, 8,
**> 18, 4) )
**>
**> new <- factor( paste(x, y, sep="_") )
**> tb <- table(new)
**>
**> pchcode <- cut(tb , c(-Inf, 1, 5, 6, 10, Inf),
**> labels=F)
**>
**> tmp <- t( sapply( strsplit( names(tb),
**> split="_") , c ) )
**> df <- data.frame( x=tmp[ ,1], y=tmp[ ,2],
**> freq=as.vector(tb), pchcode
**> = pchcode -1 )
**>
**> x y freq pchcode
**> 1 0.1 0.5 3 1
**> 2 0.1 0.6 2 1
**> 3 0.2 0.6 6 2
**> 4 0.4 1.2 8 3
**> 5 0.4 2.5 2 1
**> 6 0.5 2.5 16 4
**> 7 0.5 3 4 1
**>
**> And now to plot it, we use points() repeatedly.
**>
**> plot( as.numeric(df$x), as.numeric(df$y), type="n"
**> )
**>
**> for( i in unique( df$pchcode ) ){
**> w <- which( df$pchcode == i )
**> points( df$x[w], df$y[w], pch=as.numeric(i) )
**> }
**>
**> I am sure someone else will come up with a neater
**> solution.
**>
**>
**> Can I also suggest that you try the following
**>
**> plot( jitter(x), jitter(y) )
**>
**> or better still the following
**>
**> library(hexbin)
**> plot( hexbin(x, y) )
**>
**>
**> Regards, Adai
**>
**> On Mon, 2005-08-08 at 11:57 -0700, Kerry Bush wrote:
**> > suppose I have the following data
**> >
**> > x<-c(rep(.1,5),rep(.2,6),rep(.4,10),rep(.5,20))
**> >
*

>

y<-c(rep(.5,3),rep(.6,8),rep(1.2,8),rep(2.5,18),rep(3,4))

*> >
*

> > If I plot(x,y) in R, I will only get seven

*> distinct
**> > points. What I want to do is to use different
**> symbols
**> > to show the frequency at each point.
**> >
**> > e.g. if the frequncey is between 1 and 5, then I
**> plot
**> > the point as a circle; if the frequency is between
**> 6
**> > and 10, then I plot the point as a square; if the
**> > frequency is above 10, then I plot the point as a
**> > triangle.
**> >
**> > I am not sure how to do this in R. Can anybody
**> help me?
**> >
**> > ______________________________________________
**> > R-help@stat.math.ethz.ch mailing list
**> > https://stat.ethz.ch/mailman/listinfo/r-help
**> > PLEASE do read the posting guide!
**> http://www.R-project.org/posting-guide.html
**> >
**>
*

>

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Tue Aug 09 06:45:49 2005

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