[R] Drawing a rectangle around a barplot()
michael watson (IAH-C)
michael.watson at bbsrc.ac.uk
Thu Dec 2 14:14:55 CET 2004
Barry's suggestion did the trick.
From: Marc Schwartz [mailto:MSchwartz at MedAnalytics.com]
Sent: 02 December 2004 13:10
To: Barry Rowlingson
Cc: michael watson (IAH-C); R-Help
Subject: Re: [R] Drawing a rectangle around a barplot()
On Thu, 2004-12-02 at 11:07 +0000, Barry Rowlingson wrote:
> michael watson (IAH-C) wrote:
> > Hi
> > I can't use box() as I don't
> > want to draw a box round my entire plot, I just want to draw a box
> > as the background to certain subsets of the bars.
> One idea. Edit the barplot.default function so it doesnt call
> myBarplot = barplot.default
> then edit the myBarplot function. Add an extra parameter to the
> argument list 'add', and make it False by default:
> cex.names = par("cex.axis"), inside = TRUE, plot = TRUE,
> axis.lty = 0, add=F, ...)
> then find plot.new and wrap it in a condition:
> Now try:
> tN <- table(Ni <- rpois(100, lambda=5))
> - this puts the rectangle on top of the bars, which you dont want,
> you call myBarplot with add=T so that plot.new isnt called and the
> barplot appears over the rectangle:
> works for me, if I understand your problem correctly!
In follow up to Baz' post, the 'add' argument is already in the
barplot2() function, which is in the gregmisc bundle (gplots package) on
I have also been looking at adding a 'panel.first' and 'panel.last'
argument to barplot2, to enable functionality similar to that of
plot.default(). This would provide the ability to add additional plot
components before and/or after the bars are drawn. I'll get to that as
soon as time permits.
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