Is it possible to change the legend title in ggplot that is generated
by a colour (other than by changing the name of the variable)? For
example, this produces a legend title, tip/total_bill. How can that
title be changed?
ggpoint(ggplot(tips,aesthetics=list(y=tip,x=total_bill,colour=tip/total_bill))
)
You need to add a colour scale, and specify the name to appear on the
legend (by default it just uses the name of the variable):
p -
ggpoint(ggplot(tips,aesthetics=list(y=tip,x=total_bill,colour=tip/total_bill))
)
sccolour(p, Tip rate)
sccolour(p, This is a very long label\nsplit over two lines)
you can also use expressions to create mathematical annotations:
sccolour(p, expression(beta * x^2))
Regards,
Hadley
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