[SciPy-user] Re: Partial Derivatives
Travis Oliphant
oliphant at ee.byu.edu
Tue Mar 15 13:06:59 CST 2005
R. Padraic Springuel wrote:
> I know its been a while since I last brought this up (Vol 19, Issue
> 1), but after some digging, I've discovered
> Scientific.Functions.Derivatives (it came with the Enthought Edition
> of python that I use). It defines a DerivVar type that works well for
> taking derivatives of functions, supporting partial derivatives (even
> cross partials) very well. I haven't fully tested the limits of its
> accuracy, but some basic tests show it to be at least as accurate as
> the top level derivative function in scipy. Perhaps instead of trying
> to modify derivative (and central_diff_weights) it'll be easier in
> future versions of scipy to include this type and raise it to the top
> level.
>
This is a nice class as it does automatic differentiation. I like a lot
of what is in Scientific (though I don't like the naming conventions).
But, does it handle all cases? What if the function is not built from
standard functions? Does it perform numerical differentiation then?
-Travis
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