From: Martin Maechler <maechler_at_stat.math.ethz.ch>

Date: Sat 23 Jul 2005 - 00:09:00 EST

Dan> symbols(xx[id],yy[id],inches=F,circles=sqrt(z[id])*scale,xlab=xlab,ylab=ylab,...)}

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 Sat Jul 23 00:15:44 2005

Date: Sat 23 Jul 2005 - 00:09:00 EST

Hi,

Dan> Hello, Dan> I wrote a wrapper for symbols() that produces a Dan> bivariate bubble plot, for use when plot(x,y) hides Dan> multiple occurrences of the same x,y combination (e.g. Dan> if x,y are integers). Dan> Circle area ~ counts per bin, and circle size is Dan> controlled by 'scale'.

I'm not answering your question, but still, I need to ask/tell this:

Why don't use sunflowerplot() instead?

The excellent researchers who invented sunflower plots in the
late 70s early 1980s knew well about "bubble" alternatives and
much about drawbacks of such bubbles

{mainly the perception laws of areas vs lengths ..}

That's why they came up with the sunflowers as improvement .. See 'References' in help(sunflowerplot)

Regards,

Martin Maechler, ETH Zurich

Dan> Question: how can I automatically make the smallest Dan> circle the same size as a standard plot character, Dan> rather than having to approximate it using 'scale'? Dan> #Function: Dan> bubble.plot<-function(x,y,scale=0.1,xlab=substitute(x),ylab=substitute(y),...){ Dan> z<-table(x,y) Dan> xx<-rep(as.numeric(rownames(z)),ncol(z)) Dan> yy<-sort(rep(as.numeric(colnames(z)),nrow(z)))Dan> id<-which(z!=0)

Dan> symbols(xx[id],yy[id],inches=F,circles=sqrt(z[id])*scale,xlab=xlab,ylab=ylab,...)}

Dan> #Example: Dan> x<-rpois(100,3) Dan> y<-x+rpois(100,2) Dan> bubble.plot(x,y) Dan> ___________________________________________________________Dan> How much free photo storage do you get? Store your holiday

Dan> ______________________________________________ Dan> R-help@stat.math.ethz.ch mailing listDan> https://stat.ethz.ch/mailman/listinfo/r-help Dan> PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html

Dan> !DSPAM:42df82ae77251002021314!

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 Sat Jul 23 00:15:44 2005

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