[Numpy-discussion] rich comparisons

Greg Ball gball at cfa.harvard.edu
Thu Sep 21 11:28:02 EDT 2000

> Can anyone comment on what's happening with arrays of booleans in Numpy?
> I don't want to duplicate someone elses effort, but don't mind standing
> on someone elses shoulders.  My application calls for operations on both
> non-sparse and sparce matrices.

"Rich comparisons" are really only syntactic sugar.  For non-sparse
matrices the ufuncs greater(a,b) and less(a,b) will do the job.
Equivalents for sparse matrices probably exist.

-Greg Ball

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