Two X axis for a same Y axis

Hi,

I need to plot a curve and to use 2 X axis to represent this curve.

So in summary I have for exemple :

One vector y with a given length L One vector x1 with the same length L One vector x2 with the same length L

I would like to plot y as a function of x1 and to have in the same figure another axis on the top of the figure which represents the x2 values.

I really need to do it but I can't. I'm trying to do it for several days now but without any success. Anyone could help me please?

Thank you

Answer 1

[Jarrod Rivituso]

Have you seen this:

http://www.mathworks.com/help/releases/R2011a/techdoc/creating_plots/f1-11215.html

The trick is creating axes on top of each other, and making one transparent

[Christopher Saltonstall]

Jerrod,

I have a follow up to akbar's question. I have one data set that I want to plot with two x-axis that are related to one another. For example, I want to plot the electrical conductivity of Silicon versus dopant concentration on the bottom x-axis and have the top x-axis be spacing between dopant atoms.

y = [1 2 3 4 5];

x1 = [1e14, 1e15, 1e16, 1e17, 1e18]; %cm^-3

x2 = (3./(4*pi*x1))^(1/3); %cm

How would I do that?

Answer 2

[Paulo Silva]

plotxx

Answer 3

[akbar]

Thank you very much! :-)