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