[Numpy-discussion] matrix indexing question

[Alan G Isaac]

On Tue, 27 Mar 2007, Zachary Pincus apparently wrote: 
> Now, Bill offers up a different suggestion: indexing 
> M yields neither a matrix nor an array, but a class that 
> operates more or less like an array, except insofar as it 
> interacts with other matrix objects, or other objects of 
> similar classes. I'm interested in hearing more about 
> this, what trade-offs or other compromises it might 
> involve. 

So would you agree that in this case M[0] and M[0,:] would 
have to be different things?  Or would you then want even 
such numpy indexing not to produce matrices??

Cheers,
Alan Isaac