legend with small colored boxes

Christophe Dutang a ?crit :
Hi all,

I tried to a nice legend with small boxes filled with the colors used  
for the plots. But it does nor work, boxes are always filled with black.

An example is here

plot(1:4,1:4)
lines(1:4,4:1, col="blue")
#try something like this
legend("top",leg=c("a","b"),fill=1:2)
Etienne
legend("top",leg=c("a","b"),col=c("black","blue"), fill=TRUE)

How could I specify the colors? the argument col.box is the color of  
the whole legend box...

Thanks in advance

Christophe

PS : I work with R 2.9.0.

--
Christophe Dutang
Ph. D. student at ISFA, Lyon, France
website: http://dutangc.free.fr

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legend with small colored boxes

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