integration + Levenberg-Marquardt (Numerical Recipes)
- From: Jamie <Jamie.McQuay@xxxxxxxxxxxxxx>
- Date: Tue, 1 Apr 2008 20:03:35 -0700 (PDT)
Hello,
I am having problems getting my fitting function derivatives correct
for the Levenburg-Marquardt fitting routine.
I have a differential in the following format:
dAB/dt = ka*A(Bo-AB) - kd*AB
additional:
A is constant
I'm fitting ka,Bo and kd
I am getting the integrated format of the formula via numerical
integration (this is a test equation, they will get more difficult).
The integration is correct when I test the resulting data but I don't
know how to properly get parameter derivatives for the fitting
function.
How do I generate the parameter derivatives (dyda in the LM fitting
function) without the integrated form of the formula (i only have it
numerically).
Thank you for any hints.
Jamie
.
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