I've having a problem creating multiple x-axis and I'm hoping someone
here will be able to help me. I have two directly correlated values
(z and N) that I am using as the independent variables. What I would
like to do is plot my data vs. N, but then show the corresponding z
values on the top axis (there is a 1-to-1 correspondence between every
z and N value). I have tried twiny, but this requires me to plot the
line again and, since the z and N values are scaled differently, I end
up with 2 lines that don't match up.
I hope that was understandable. Any advice? Thanks.