Single point derivative

[RandomUsernameToSave]

Is there a way to calculate the partial derivatives of a single point of a grid (without retrieving it after calculating it on the whole grid) ?
I can't manage to do it.
If there is no way, I might add it manually,
Best regards :)

[maroba]

Hi, sorry for the late reply.

Yes, there is a way to evaluate only at a single grid point, however, not with the FinDiff object itself, but with the Stencil object. To see how to create stencils, have a look at this example

After you have created the stencil d_dx, you can apply it to an array f by calling it, and passing the index tuple of the grid point to the at keyword argument.

d_dx(f, at=(5,))