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Re: Condition/ constaint problem

  • To: mathgroup at smc.vnet.net
  • Subject: [mg41010] Re: Condition/ constaint problem
  • From: "Ersek, Ted R" <ErsekTR at navair.navy.mil>
  • Date: Tue, 29 Apr 2003 05:20:44 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

At  http://forums.wolfram.com/mathgroup/archive/2003/Apr/msg00688.html
David Withoff explained how NumericalMath`NLimit`ND can be used to correct
for a problem with approximating a derivative via  the built-in Derivative
function.  David said the built in Derivative function does the same thing
as NumericalMath`NLimit`ND but without knowing the scale of variation of the
function.  Perhaps the built in Derivative function should have the same
options as NumericalMath`NLimit`ND which are (WorkingPrecision, Scale,
Terms, Method).  Of course the setting of these options would only be
relavent when numerical differentiation is needed.  Also these options could
have default settings that would cause the calculation to work as it does
now (ie. Scale->Automatic).

Regards,
  Ted Ersek




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