Dear R users,
I have what I think it is a very simple question concerning plots in R. If
you could help me I would be very grateful.
How can I include a legend in my plot? Below I give an example of my data
and the code I am using.
What I wish to accomplish is a legend saying that the black line refers to
"A", the red to "B" and the blue to "C". Any suggestions?
# data
x<-c(1,2,3,4,5)
y1<-c(2,4,6,8,10)
y2<-c(3,4,5,6,7)
y3<-c(2,3,5,7,9)
# plot
plot(x, y1, main="plot", type="l", xlab="x-axis", ylab="y-axis",
col="black")
lines(x, y2, col="red")
lines(x, y3, col="blue")
Thanking in advance.
Best regards,
Mafalda
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