[SciPy-dev] I can't find howto get exp(x) or a^x in NumPy_for_Matlab_Users page
Thu Jun 28 10:24:23 CDT 2007
Anne Archibald wrote:
> On 28/06/07, Matthieu Brucher <firstname.lastname@example.org> wrote:
>> numpy.exp for a element-wise exponentiation, and a**x for a^x
> To expand on this: if M is a matrix (not array), then M**3 will
> compute the cube of the matrix (fairly efficiently). But this will not
> handle fractional exponents (I'm not totally sure those are
> well-defined anyway) and I don't know if there is a matrix exponential
> in numpy.
scipy.linalg has expm, expm2, and expm3 which do the matrix exponential by Padé
approximation, eigenvalues, and Taylor series, respectively.
"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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