[R] coloring a graph left or right of an abline
Roland Rau
roland.rproject at gmail.com
Thu Feb 21 21:21:39 CET 2008
Hi Georg,
Georg Ehret wrote:
> Dear R community,
> I would wish to color the background of my histogram differently to the
> left and right of an abline... Can you please help?
maybe not very elegant or beautiful, but I hope it will get you started:
################### Start of Code Example
n <- 1000
myxlims <- c(-3,3)
myylims <- c(0,0.6)
mydata <- rnorm(n)
marker <- 1
hist(mydata, breaks=50, xlim=myxlims, ylim=myylims, freq=FALSE)
rect(xleft=myxlims[1], xright=marker, ybottom=0, ytop=max(myylims),
col="red", border=FALSE)
rect(xleft=marker, xright=myxlims[2], ybottom=0, ytop=max(myylims),
col="blue", border=FALSE)
hist(mydata, breaks=50, xlim=myxlims, ylim=myylims, col="green",
freq=FALSE, add=TRUE)
abline(v=marker, col="black", lwd=3, lty=1)
################### End of Code Example
Best,
Roland
>
> Thankin you,
> Georg.
>
> ****************************
> Georg Ehret
> JHU
> Baltimore - USA
>
> [[alternative HTML version deleted]]
>
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