[R] expression(alpha) in legend()

[Tord Snall]

Dear all,
I try to plot include expression(alpha) in a legend():

x<-  seq(0,150)
par(mfrow=c(1,1))
matplot(x, outer(x, c(0.001, 0.01, 0.05, 0.1, 0.5),
function(x, k) exp(-k*x)), type="l", lty=1:5, col=1, lwd=3, ylim=c(0,1), 
xlim=c(0,170), ylab="", xlab="Distance (m)")

legend(110, 0.8 , c(expression(alpha), "= 0.001","alpha=0.01","alpha=0.05", 
"alpha=0.1", "alpha=0.5"), lty=c(1,2,3,4,5), lwd=3, col=1,merge=T)

I want to replace the text "alpha" with the alpha symbol.

Could someone please help me with this.


Thanks in advance!

Sincerely,
Tord Snäll

-----------------------------------------------------------------------
Tord Snäll
Avd. f växtekologi, Evolutionsbiologiskt centrum, Uppsala universitet
Dept. of Plant Ecology, Evolutionary Biology Centre, Uppsala University
Villavägen 14			
SE-752 36 Uppsala, Sweden
Tel: 018-471 28 82 (int +46 18 471 28 82) (work)
Tel: 018-25 71 33 (int +46 18 25 71 33) (home)
Fax: 018-55 34 19 (int +46 18 55 34 19) (work)
E-mail: Tord.Snall at ebc.uu.se
http://www.vaxtbio.uu.se/resfold/snall.htm
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