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nepean
2006 Jan 12
3
Curve fitting
Hi!
I have a problem of curve fitting.
I use the following data :
- vector of predictor data :
0
0.4
0.8
1.2
1.6
- vector of response data :
0.81954
0.64592
0.51247
0.42831
0.35371
I perform parametric fits using custom equations
when I use this equation : y = yo + K *(1/(1+exp(-(a+b*ln(x))))) the
fitting result is OK
but when I use this more general equation : y = yo + K