Re: [yt-users] Profiles, root grid

David, Grid collection works as any other AMR3DData container. In reference to the __getitem__ issue, it can be challenging to debug this sort of thing remotely without the line that causes the error and a traceback. -Matt On Mon, May 9, 2011 at 10:24 AM, David Collins wrote:

Hey, Matt--

I found that if I do "lazy_reader = False" the covering grid works fine.  It looks like somewhere the field string in one of the __getitem__  calls is being treated like a list.

I'm interested in using this with some derivative quantities, can I just send 'DivV' to the grid collection in your example, or will I have to let it know that it should grab ghost zones?

d.

On Mon, May 9, 2011 at 10:57 AM, Matthew Turk wrote:

...

Hi David,

Try a grid_collection:

gc = pf.h.grid_collection([0.5,0.5,0.5], [pf.h.grids[0]])

Note that it still requires a 'center'.  Also, this object is not supposed to do any child masking, so if you find that it does, let me know.

-Matt

On Mon, May 9, 2011 at 9:43 AM, david collins wrote:

...

Hi there--

I'd like to add a profile object using only the root grid.  I typically do something like this:

pc.add_profile_object(region,fields, weight=weight)

Is there a way to restrict this to only root grid tiles?  I've tried using a covering grid, but that's throwing some key error (that I'm looking into presently, I'll have more info if/as I sort it out)

Thanks, d.

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