On Thu, 5 Jun 2003 07:20:11 -0700
"Anna H. Pryor" <[EMAIL PROTECTED]> wrote:
> Is there a simpler way then the solution to the one that was posted here? I'm
> not very proficient with legend, and I don't understand this solution. All
> I have is two or more lines on one plot that I want to put a legend on and I
> can't figure out how to do it from the examples. Can you give a very simple
> example? It does not have to be fancy!! I have never worked with a package
> where the legend was not automatic.
>
>
>
> ---------- Forwarded Message ----------
>
> Subject: Re: [R] legend() with option adj=1
> Date: Wed, 21 May 2003 09:19:11 +0200
> From: Uwe Ligges <[EMAIL PROTECTED]>
> To: Jerome Asselin <[EMAIL PROTECTED]>
> Cc: [EMAIL PROTECTED]
>
> Jerome Asselin wrote:
> > Hi there,
> >
> > I want to justify to right the text of my legend. Consider this short
> > reproducable example.
> >
> > x <- 1:5
> > y1 <- 1/x
> > y2 <- 2/x
> > plot(rep(x,2),c(y1,y2),type="n",xlab="x",ylab="y")
> > lines(x,y1)
> > lines(x,y2,lty=2)
> > legend(5,2,c("1,000","1,000,000"),lty=1:2,xjust=1,yjust=1)
> > legend(5,1.5,c("1,000","1,000,000"),lty=1:2,xjust=1,yjust=1,adj=1)
> >
. . .
>
> Uwe Ligges
Here is an alternative to consider. In plots such as this I like to label the curves
where they are most separated and avoid legends altogether (as well as usually
avoiding the need for different line types, unless curves intertwine):
x <- 1:5
y <- 1/x
y2 <- 2/x
w <- list('1/x'=list(x=x,y=y),'2/x'=list(x=x,y=y2))
library(Hmisc) # see http://hesweb1.med.virginia.edu/biostat/s/Hmisc.html
labcurve(w, pl=TRUE, offset=.1)
Or put a legend in the most empty region of the graph:
labcurve(w, pl=TRUE, lty=c(2,1), lwd=c(1,3), col=gray(c(0,.7)), keys='lines',
xlab=expression(chi))
# lty only for demonstration - omit that for this example. Thick gray scale # lines
are excellent for step functions
Or use same line types but put symbols every so often (point.inc= to override default
spacing; this works well for overlapping step functions also):
labcurve(w, pl=TRUE, keys=1:2) # uses pch=1:2
---
Frank E Harrell Jr Prof. of Biostatistics & Statistics
Div. of Biostatistics & Epidem. Dept. of Health Evaluation Sciences
U. Virginia School of Medicine http://hesweb1.med.virginia.edu/biostat
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