On Fri, 2004-11-05 at 12:57, Marcus Leinweber wrote:
> hello,
>
>
> the following example gives a plot with a legend:
>
>
> plot(-10:10,-10:10,type="n")
> x=1:10
> y=1:10
> tt=c("A","B","C","D","E","F")
> text(x,y,tt,cex=.8)
> legend(-10,10,paste(tt," ",x,y),text.col=c(2:4)) # each row in different
> colour
>
> but how can I colour the legend text by "column" meaning tt in red, x in
> blue and y in green?
>
> thanks for your help.
>
> marcus
This is possible, using a bit of a trick with legend(). Instead of
printing each row in sequence, we print each column in sequence:
x <- 1:10
y <- 1:10
tt <- LETTERS[1:10]
plot(x, y, pch = tt)
# Now use legend. Modify the vector of
# text items here so that each set of 10
# elements are in sequence. Modify the color
# argument to be a sequence of 10 of each color
# set the 'ncol' argument to 3
legend(1, 10, c(tt, x, y),
text.col = rep(2:4, each = 10),
ncol = 3)
HTH,
Marc Schwartz
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