[R] pairs() Legend
murdoch at stats.uwo.ca
Tue Sep 25 15:26:51 CEST 2001
On Tue, 25 Sep 2001 22:07:15 +1200 (NZST), you wrote in message
<Pine.SOL.4.21.0109252204270.17045-100000 at stat1.stat.auckland.ac.nz>:
>Is it possible to create a legend in a pairs() plot?
>For example, suppose I have the following R codes:
> pairs(iris[1:4], main = "Anderson's Iris Data -- 3 species",
> pch = 21, bg = c("red", "green3", "blue")[codes(iris$Species)])
>How can I created a legend that shows which colour represents to which
The legend function is the general purpose way to put a legend on a
plot. For the legend you want, you'd use
legend(locator(),legend=levels(iris$Species), pt.bg = c("red",
"green3", "blue"), pch=21)
The locator() function lets you position it manually. You might want
to put in fixed values, instead.
The default pairs() call gives no space for a legend, so you'll
probably want to use "oma=c(4,4,6,10)" or something to give yourself
some extra space for the legend.
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