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Re: Plotting versus two x axes [message #77632]

Wed, 14 September 2011 14:39

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

David Fanning writes:

> Here is an example (that badly needs to be updated to
> Coyote Graphics!):
>
> http://www.idlcoyote.com/graphics_tips/wavenumber.html

I should mention, because you want to plot (oplot, actually)
on the second axis, that will also require a SAVE keyword
on the AXIS command to make that the axis used for the
second data set.

Here is another article that is relevant:

http://www.idlcoyote.com/tips/another_yaxis.html

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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Re: Plotting versus two x axes [message #77633 is a reply to message #77632]

Wed, 14 September 2011 14:34

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

DAVIDE LENA writes:

> I think I am stuck with a classical problem, but I can't find a
> solution: I have a set of values that I wish to plot versus two
> different independent variables, so that I wish to have a bottom and
> top x-axis showing the two independent variables. I tried using
> "AXIS, XAXIS=1, ..." but I can't get it working.
>
> In gnuplot words I'am trying to do something like:
> plot 'file.dat' u 3:xtic(1), 'file.dat' u 3:x2tic(2).

Here is an example (that badly needs to be updated to
Coyote Graphics!):

http://www.idlcoyote.com/graphics_tips/wavenumber.html

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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