Could someone help me on the following:
SAS has DUD (Does not Use Derivatives) for nonlinear regression.
Does "R" has a similar capability?
I am not good at derivatives and may get my derivative wrong before
feeding it to a nonlinear regression procedure.
Any help would be much appreciated.
Liu
Hancock Forest Management NZ
Tokoroa, New Zealand
DDI: 07-8850387
Mobile: 021-1576178
A/H: 06 868 4288
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