MS values in levelsplot

[friedrich95]

Hello,
is there an easy way to assign the MS levels to the energy levels that are plottet in the levelsplot?

Thank you very much

[Stefan Stoll]

Not directly, but it is possible to color the levels by their |mS| value, i.e. the magnitude of the expectation value of the spin operator S_zL, where zL is the lab z axis along the magnetic field.

For this, use the option Opt.SlopeColor = true.

Here is an example:

Code: Select all

clear, clc

Sys.S = 7/2;
Sys.D = 1000;

Opt.SlopeColor = true;
levelsplot(Sys,'xy',[0 300],[],Opt);

[thanasis]

That's a really nice addition!

Is there a way to define a custom color palette for the various ms values?

Thanks,

Thanasis

[Stefan Stoll]

Unfortunately no. The color is hard-wired. You could change it manually after using get(gca,'Children'), but that's probably quite tedious.

[thanasis]

Thanks for this Stefan.

In levelsplot, line 197 I changed:

Code: Select all

 colormap(flipud(parula)); -->   colormap(flipud(Opt.ColorMap));

and I gave a new option when I invoke the command:

Code: Select all

Opt.ColorMap = jet;

The only workaround I needed when doing this was to copy letter2vec.m from private to the functions directory (for some reason it needed that particular function and could not find it, even after an easyspin compile).
The result is as expected for the jet color palette:

Selection_574.png (18.88 KiB) Viewed 13110 times

Would that be compatible to permanently include in the levelsplot code?

All the best

[Stefan Stoll]

This looks like a reasonable addition. Could you please prepare a PR for this on GitHub?

[thanasis]

OK, but I am a git novice: if I understand, I either need to be invited as collaborator to your repo, or fork it and work on my fork. If so, which of the two do you suggest?

[Stefan Stoll]

Fork the repo, make a branch in your fork, and then make a PR from your fork/branch to the main branch of EasySpin.