Paul F. Dubois writes:

def compress (condition, x, dimension=-1): """Select those parts of x for which condition is true. Masked values in condition are considered false. """ c = filled(condition, 0) m = getmask(x) if m is not None: m=Numeric.compress(c, m, dimension) d = Numeric.compress(c, filled(x), dimension) return masked_array(d, m)

I did want a treatment of masked conditions. Consider:

compress( x > 10, x)

I see your point, but this doesn't generalize to x having more than one dimension. And with my semantics, for your example (assuming 1-d), you could substitute compress((x > 10).filled(0), x) which isn't very obscure. Moreover, sometimes it is interesting to compress an array in such a way that masked values are carried along as masked values; this cannot be done with the existing compress(). Michael -- Michael Haggerty mhagger@alum.mit.edu