[PyX-user] Reciprocal Scale?

[Diederik H. <die...@st...>]

Hello to all!
 
I first want to say that I'm absolutely astonished with the power and
beauty of PyX. I just discovered it a week ago and I find it the most
flexible and professional plotting program I ever met!
There is one problem though... and I need it relatively fast for my
masters thesis.
 
I need to make a graph:
 
    X-axis = wavelength, linear
    Y-axis = photon count, linear
    top-Y-axis = wavenumber, reciprocal
 
The input file has two columns which deliver X and Y. This is not a
problem at all.
The top Y-axis is calculated as 1e7/X. This means I need to do a
calculation "by hand" or in the worst case add an extra column.
And I need a scale which is reciprocal:
 
 
1          1/2      1/3   1/4 1/5 etc...
 
I can really use any suggestions. The only program so far that can do it
is MicroCal Origin, and I hate that.
Can I easily convert the bottom X-axis to the top X-axis? And can I do a
reciprocal scale? Perhaps via a trick?
 
Thank you!