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MathGroup Archive 1996

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Re: Derivative of InterpolatingFunction

  • To: mathgroup at smc.vnet.net
  • Subject: [mg4372] Re: Derivative of InterpolatingFunction
  • From: Mark James <mrj at cs.usyd.edu.au>
  • Date: Mon, 15 Jul 1996 06:51:09 -0400
  • Organization: The University of Sydney
  • Sender: owner-wri-mathgroup at wolfram.com

Andrei Constantinescu wrote:
> 
>  I have the following problem:
> 
>  fct = InterpolatingFunction[{{0., 3.14159}, {0., 3.14159}}, <>]
> 
>  ... so its an InterpolatingFunction of 2 variables .
> 
>  What I want now to do is the derivative of this function.

For the time being you will have to use the ND function as part
of NumericalMath`NLimit` in the standard packages.

You can use ND every time you need a derivative, or for greater
speed you may like to pre-compute the partial derivatives as
interpolating functions themselves using ND.

-- 
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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