> You'd want to update your mask appropriately to get everything you > want to select, one criteria at a time e.g.: > mask = a[:,0] == 1 > mask &= a[:,1] == 1960 > > Alternatively: > mask = (a[:,0] == 1) & (a[:,1] == 1960) > but be careful with the parens, & and | are normally high-priority > bitwise operators and if you leave the parens out, it will try to > bitwise-and 1 and a[:,1] and throw an error. > > If you've got a ton of parameters, you can combine these more > aesthetically with: > mask = (a[:,[0,1]] == [1, 1960]).all(axis=1) > > ~Brett
Zach and Brett, Many thanks -- that is exactly what I need. Cheers, Ted _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
