[SciPy-user] Vectorize vs Map
Robert Kern
robert.kern at gmail.com
Thu Mar 15 13:04:07 EDT 2007
Lorenzo Isella wrote:
> Dear All,
> Probably another newbie question: I like quite a lot the vectorize()
> command which allows me to skip iterations on functions, but the map()
> command on a list performs a similar task if I am not mistaken.
> Is there any reason to favour one above the other or is it just a
> matter of taste?
vectorize() takes a Python function and turns it into a ufunc. ufuncs do a lot
more than map() does. They can take multidimensional arrays. n-ary ufuncs can
take multiple inputs and broadcast them against each other. ufuncs have methods
like .inner() and .reduce() which are quite powerful.
--
Robert Kern
"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth."
-- Umberto Eco
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