This should be quite simple, although I was not able to find a solution in the Matlab docs.

I have to plot two or more sets of data, that can be fit in two different ranges. So I can use plotyy to manage this.

What I want to do, is being able, once created a plot, to overwrite or simple add traces to one of the two axes, selectively. I tried to catch the parameters returned by plotyy, but I wasn't able to decypher them.

Any help is appreciated.