[Numpy-discussion] dot function or dot notation, matrices, arrays?

Dag Sverre Seljebotn dagss@student.matnat.uio...
Tue Dec 22 03:06:50 CST 2009


Christopher Barker wrote:
> Dag Sverre Seljebotn wrote:
>> This is readily done -- there is no computational portion except for 
>> what is in NumPy/Scipy or scikits, and I intend for it to remain that 
>> way. It's just another interface, really.
>>
>> (What kind of computations were you thinking about?)
> 
> Nothing in particular -- just computational as opposed to symbolic 
> manipulation.

OK. As a digression, I think it is easy to get the wrong impression of 
Sage that it is for "symbolics" vs. "computations". The reality is that 
the symbolics has been one of the *weaker* aspects of Sage (though 
steadily improving) -- the strong aspect is computations, but with 
elements that NumPy doesn't handle efficiently: Arbitrary size integer 
and rationals, polynomials (or vectors of their coefficients if you wish 
-- just numbers, not symbols), and so on.

So the Sage design is very much about computation, it is just that the 
standard floating point hasn't got all that much attention.

-- 
Dag Sverre


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