On 02/09/2014 09:57 AM, Benjamin Ward (ENV) wrote:
Hi, fellow R users,
I've been asked to make a plot with two datasets each with a different x axis,
and it's been suggested one be at the top and the other at the bottom of the
graph. I normally use ggplot2, and I know how to plot multiple datasets by
simply + a new geom with a different data option, but usually in these case my
different datasets have had the same x and y axes. Can I add a new x axis to
the top of the plot in ggplot2 or one of the other graphics packages?
Hi Ben,
The basic method would be something like this:
plot(1:4,rnorm(4))
par(new=TRUE)
plot(c(10,20,30,40),rnorm(4),axes=FALSE)
axis(3,at=c(10,20,30,40))
Obviously you would need to do a bit of messing around with titles and
axis labels, etc.
Jim
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