Wavenumber notation

[navidcy]

Currently grid contains arrays for (k, l). Should we change to (kx, ky)? I'd vote "yes".

grid.kx
grid.kxr
grid.ky
grid.ksq
grid.ksqr
grid.invksq
grid.invksqr

One would be tempted to use unicode, e.g.

grid.k²
grid.k²r
grid.k⁻²
grid.k⁻²r

but that makes it rather cumbersome for new users...

Any thoughts?

@glwagner, @BrodiePearson, @liasiegelman

(The docs at the moment have a mixture of the two so it would be good to smooth it out after we settle on the issue.)

[liasiegelman]

@navidcy I agree that kx and ky is better than k and l. I prefer without unicode though.