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Re: Numerical Differentiation


Russell Brunelle wrote:

> I have needed to perform numerical differentiation as well.  The following
> function, which finds the derivative with respect to f[t] at point t0 is
> the best I could do.
> [ Function emulating differentiation by using small deltas deleted ]

Thanks Russell, I was using a method similar to this, but I wanted an
exact/stable/publishable(!) method.

I just discovered there is a numerical differentiation function
(ND[f[x], x, x0]) in the standard packages.  It is available under
NumericalMath`Nlimit`, so is not listed in the index of the package
guide.  It works, but is slower than the method we have both been using.

-- 
Mark James                                  | EMAIL : mrj at cs.usyd.edu.au |
Basser Department of Computer Science, F09  | PHONE : +61-2-351-3423     |
The University of Sydney NSW 2006 AUSTRALIA | FAX   : +61-2-351-3838     |

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