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?

Thanks,
Ben W.



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