[SciPy-user] Polynomial interpolation

[Robert Kern]

On Mon, Apr 28, 2008 at 3:11 PM, Anne Archibald
<peridot.faceted at gmail.com> wrote:
> 2008/4/28 Robert Kern <robert.kern at gmail.com>:
>
> > On Mon, Apr 28, 2008 at 12:17 PM, Gael Varoquaux
>  >
>  > <gael.varoquaux at normalesup.org> wrote:
>  >
>  > >  I am not suggesting to make a bad design choice, or to go
>  >  >  out of our way, I just want a two liner helper function.
>  >
>  >  I'm afraid that *is* widely recognized as a bad design choice.
>
>  Well, I think the way to go is to mimic splrep/splev:
>
>  def krogh_rep(xi, yi):
>     return KroghInterpolator(xi, yi)
>  def krogh_ev(kr, x, der=0):
>     if der==0:
>         return kr(x)
>     else:
>         return kr.derivative(x, der=der)
>
>  The only danger is that if it ever raises an exception and the users
>  see how simple it is they will feel like idiots.

Well those certainly aren't useful. The only functions I would
consider adding would be "one-shot" functions, e.g.:

  def krogh(xi, yi, x):
      return KroghInterpolator(xi,yi)(x)

-- 
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