[Tutor] Change datatype for specific columns in an 2D array & computing the mean

[Oscar Benjamin]

On 24 January 2016 at 17:24, Peter Otten <__peter__ at web.de> wrote:
>
> I'm an amateur with numpy, and unfortunately my favourite search engine
> didn't come up with a numpy-specific way to group rows in a 2D array.

What do you mean by "group rows"?

I thought the OP's problem is really to filter rows which I already
showed how to do in numpy.

--
Oscar