[Numpy-discussion] array vs matrix

Robert Kern robert.kern@gmail....
Sat Jun 7 20:57:50 CDT 2008


On Sat, Jun 7, 2008 at 20:54, Anne Archibald <peridot.faceted@gmail.com> wrote:

> For consistency, it makes a certain amount of sense to have sin(A)
> compute a matrix sine, since A**n computes a matrix power. But looking
> at the matrix exponential, I see that we have several implementations,
> none of which is satisfactory for all matrices. I would expect the
> matrix sine to be similar - particularly when faced with complex
> matrices - so perhaps needing an explicit matrix sine is a good thing?

I think so. We already have scipy.linalg.sinm(), cosm(), expm(), expm2(), etc.

-- 
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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