[yt-dev] Downgrading Grid Resolution in yt

[Cameron Hummels]

Hello everyone,

Does anyone know of a way to universally downgrade the grid refinement 
by 1 level in yt (for an enzo output)?  I know that one can resample an 
output to any arbitrary maximum refinement level using a covering grid 
(or a smoothed covering grid), but the result only "downgrades" data at 
the highest levels of refinement.  What I'm instead looking for is a 
method to "downgrade" the resolution of the data at every grid element 
regardless of its refinement.

For example, if I have a two adjacent grids, one with 10 levels of 
refinement and the other with 3, I would like them resampled at 9 and 2, 
respectively, as opposed to 9 and 3, which is what happens in the case 
of the covering grid.  Additionally, it might be nice to retain the AMR 
structure of the original output, so that the memory consumption is 
relatively low (much lower than an equivalent covering grid).

This technique would be very useful for resolution studies to determine 
the effects of poorer resolution on post-processing analysis.  Anyway, 
has anyone played around with this?  If not, I'll look into writing 
something up in the next few weeks, but I figured I'd ask.

Cameron

-- 
Cameron Hummels
PhD Candidate, Astronomy Department of Columbia University
Public Outreach Director, Astronomy Department of Columbia University
NASA IYA New York State Student Ambassador
http://outreach.astro.columbia.edu
PGP: 0x06F886E3