Thank you Tyler.
I thought the problem was due to the use of expression(...).

Best,
Zhongyi

On Thu, Jul 28, 2011 at 2:49 AM, Tyler Rinker <tyler_rinker@hotmail.com>wrote:

>  Use the text.col argument as below
> ?legend
>
>
> x=y=1:100
> z=seq(0.5,50,by=0.5)
> plot(x,y,type='l',col='black')
> lines(x,z,col='red')
> legend('topleft',c(expression(paste(alpha," = ", 1)),
> expression(paste(alpha," = ", 2))),text.col=c("black","red"))
>
>
>
>
>  > Date: Thu, 28 Jul 2011 02:32:04 -0500
> > From: zhongyi-yuan@uiowa.edu
> > To: r-help@r-project.org
> > Subject: [R] color of math annotation in legend
>
> >
> > Dear useRs,
> >
> > Can someone help me to adjust the color of math annotation in a legend?
> The
> > following code gives me a black "alpha = 2".
> >
> > x=y=1:100
> > z=seq(0.5,50,by=0.5)
> > plot(x,y,type='l',col='black')
> > lines(x,z,col='red')
> > legend('topleft',c(expression(paste(alpha," = ", 1)),
> > expression(paste(alpha," = ", 2))),col=c('black','red'))
> >
> > Is it possible to make it red? Thanks in advance for your help.
> >
> > Best,
> > Zhongyi Yuan
> >
> > [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help@r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
>

	[[alternative HTML version deleted]]

