Hi Stephen, You might try printing out what is fed into the combine function; I think what you really want to do is return (data["creation_time"] > 0).sum() in _NumberOfStars. Inside _combNumberOfStars try printing both data and ct, as well, to see if it's an axis problem with the combine function. -Matt On Fri, Dec 10, 2010 at 3:24 PM, Stephen Skory <stephenskory@yahoo.com> wrote:
Matt,
Try: dd.quantities["NumberOfStars"]()
Duh! That works, sort of: Now I'm getting '0' when I am expecting '1'. Any ideas why? If I put a print in _NumberOfStars() I see that one of the grids has one star, the others zero, but otherwise things are not as I expect.
Stephen Skory stephenskory@yahoo.com http://stephenskory.com/ 510.621.3687 (google voice) _______________________________________________ yt-users mailing list yt-users@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org