[yt-users] Accessing less refined grids

[Elizabeth Tasker]

Hi,

Is there an easy way of grabbing the value of the grid above (one less
refined) than the current one? e.g. if I had the grid and cell number
of a cell, could I deduce the grid and cell number of its parent?

I need to look at a smoothed field, which I could calculate, but it
would just be equivalent to the less refined level, so I wondered if
there was an easier way.

Elizabeth