ggplot2: annotating plot with mathematical formulae
Hi Stephen, The problem is that the label on the graph doesn't get rendered with a superscript. I want the label on the graph to be rendered the same way as the label you have put on the axis. I am plotting a piecewise function and I wanted to label each section of it. Paul
stephen sefick wrote:
how about this
a <- 1:10
b <- 1:10
d <- paste("x","^","{n-1}")
qplot(a,b, xlab=expression(x^{n-1}))+geom_text(aes(4,8, label=d))
On Fri, May 15, 2009 at 10:02 PM, Paul Emberson <email at calidasoft.co.uk> wrote:
Hi,
Is there a way of annotating a ggplot plot with mathematical formulae?
I can do
geom_text(aes(label="some text", ...
but I can't do
geom_text(aes(label=expression(x^{n-1}), ...
It gives the error
Error: geom_text requires the following missing aesthetics: label
Is there a convenient equivalent?
Cheers,
Paul
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