| T O P I C R E V I E W |
| D650-1349-EFD3-30C7 |
Posted - 06/10/2010 : 09:41:45 AM
I am trying to plot the profile (lambda x) of a 2D FFT image on a 2D graph with pixel values on a bottom X axis (ranging from -255 to 256) and the corresponding wavelength values (lambda (nm)) on a top X axis (here ranging 0.13 ... +inf ... 0.13).
I also want to have some precise values written on the top axis with tick-indexed dataset (which I tried to do using Tick labels > Type: Tick-indexed dataset).
I have tried to use a reciprocal X axis at the top, but the problem is that the value corresponding to 0 at the bottom would be infinite at the top.
I also tried to have a 2nd and a 3rd layer corresponding respectively to the [-255; 0[ and ]0; 256] intervals, but it does not seem to work (top axis with a wrong scale or indexed ticks at the wrong place), even when trying to introduce some breaks towards infinity.
Could you please help me with it?
Yann
Origin Ver.: 8.0 SR6
Operating System: XP |
| 2 L A T E S T R E P L I E S (Newest First) |
| larry_lan |
Posted - 06/10/2010 : 10:24:14 PM
Hi Yann:
How the top axis maps to the bottom axis? Your top axis is not linear scale, so how 0.13 maps to 256, any formula?
Thanks
Larry |
| D650-1349-EFD3-30C7 |
Posted - 06/10/2010 : 10:04:04 AM
This is an example of what I would like to do (axis drawn manually here but to scale):
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