Plot two data sets with two different Y axis scales

[timofurrer]

Is there a way to plot two data sets in the same graph that share the X-axis scale (time in my case) but have two different Y-axis scales. I'd want to print a legend for one data set on the left and one on the right side of the graph.

Is that possible somehow?

[andig]

That would be great- or allow to have multiple axes on a single side?