I think something similar is asked in the forum before and there is a documentation on how to add second a y-axis. But I am not exactly getting what I want. It would be great if someone can help.
I want something very simple. I have x1, x2, and corresponding y. I want to plot y and show x2 at the bottom axis and x1 at the top axis. Please remember, x1 and x2 are related, so x1 = 14 will refer to x2 = 399 and they will plot y =1..and so on.
x1 = [14 16 18 20 22];
x2 = [399 520 675 830 1001];
y =[1 2 3 4 5];