Add top X-axis with different scale

Add an X-axis on top (additional to the one on bottom) of the figure, with its own ticks labels ...

Description

Add an X-axis on top (additional to the one on bottom) of the figure, with its own ticks labels and axis label (allow double scale).
Ticks, minor ticks positions and x limits are set to be identical for top and bottom axis. Moreover, they are linked, i.e. a modification of one of them, even after execution of this function, will result in modification of the other one.

Acknowledgements

The author wishes to acknowledge the following in the creation of this submission:
addtxaxis
This submission has inspired the following:
LinkTopAxisData

• MATLAB release: MATLAB 7.1.0 (R14SP3)

[John D'Errico]

I don't forsee a need a secondary x-axis much, but when I
want one, this is a good, simple tool for that purpose.

My only (minor) beef is with the property/value pair
interface. Its nice if properties can be shortened, as long as that shortening is unambiguous. Thus, the 'expression'
property should be properly used even if we supplied its
name as 'exp'. Since this takes only a couple of lines of
code to implement, its a very nice feature.

[Emmanuel Dinnat]

Reply to John D'Errico
1st, thank you for the return.
The change has been done in the new version.
Also changed the way of evaluating the 'expression'. That should allow more complexe and easier implementation of these 'expressions'.

[Stian Ingebrigtsen]

Why bother to use two manipulated Subplots when you can use the axec( ) function to generate a new set of opposite axis on your graph??? Your code will be a lot simpler and it is still possible to link axis properties...

[YI xu]

For a general user, I wonder if somebody can give an example statement, it's easier for users to understand. Thanks

[Lars Olav Vestland]

I agree with YI xu. (Somehow I cannot make it to function, has the evalin function been changed in MATLAB?)

Stian: axec() function? Did you mistype? Does not seem to be in MATLAB nor in 'fileexchange'.

[Pacome Delva]

Hello, thank you for your contribution.
I have a problem. I want to add a top log axis to a loglog plot. My problem is that I don't know how to obtain a nice formatting, with the power in super script, as for the down x axis. I have only access to the fprinf option for the formatting.
Thank you

[Pacome Delva]

the script doesn't work for a loglog plot...

[Itamar]

Hi,
First, thank you for your submission. Well documanted and written. It took me some time to figure it out, but it works like magic and as in the example.
You had really helped me here.
Thanks

[Chiao]