[R] Circular plot

Bert Gunter bgunter.4567 at gmail.com
Mon Feb 13 18:53:18 CET 2017

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Bert Gunter

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On Mon, Feb 13, 2017 at 8:33 AM, swaraj basu <projectbasu at gmail.com> wrote:
> I want to plot segments deleted from mitochondrial DNA of patients with
> neuromuscular disorders. I generate the plot on a linear chromosome using a
> code similar to as shown below
> start<-c(1,5,600,820)
> end<-c(250,75,810,1200)
> score<-c(7,-1,4,-6.5)
> dat<-data.frame(start=start,end=end,score=score,col="blue",stringsAsFactors=F)
> dat[dat$score<0,]$col<-"red"
> plot(1:1500,rep(0,1500),type="p",ylim=c(-10,10),col="white",xlab="position",ylab="score")
> segments(dat$start, dat$score, dat$end, dat$score, col=dat$col, lwd=3)
> Since the human mitochondria is a circular genome, I would like to
> visualise the plot generated above as a circle where all segments with
> positive score lie inside the circle and those with negative score lie
> outside. Attached is a representation of my requirement, although here it
> is manually drawn. Can someone help me on this?
> --
> Swaraj Basu
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