On 9/9/07, Orest Kozyar <[EMAIL PROTECTED]> wrote: > > In the following output (see below), why would x[1,None] work, but > x[1,None,2] or even x[1,2,None] not work?
None is the same thing as newaxis (newaxis is just an alias for None). Armed with that tidbit, a little perusing of the docs should quickly explain the behaviour you are seeing. Incidentally, I would be very interested in a solution that allows me to > index numpy arrays using a list/iterable that might contain None > values. Is > there a straightforward way to do so, or should I just use list > comprehensions (i.e. [x[a] for a in indices if a])? You could try something using compress x[compress(indices, indices)] for example. Whether that's superior to a iterator solution would probably depend on the problem. I'd probably use fromiter instead of a list comprehension if I went that route though. There are probably other ways too. It very much depends on the details and performance requirements of what you are trying to do. -- . __ . |-\ . . [EMAIL PROTECTED]
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