grad(H^2) plot

["mbe_pondro" <mbe_pondro@xxxxxxxxx>]

Hello femm group,

I'm working on magnetic separator and I need to plot 
"grad(H^2)" . Is there a way to do it with lua scripting. I tried a 
finite difference approach using getpointvalue() on a set of 
predefined points but there was too many curve distorsion due to 
derivation error. I'm searching for a way to get more smooth and 
precise curve. 
Any help would be appreciated.


Mbe.