Re: Nonlinear Curve Fitting

*To*: mathgroup at smc.vnet.net*Subject*: [mg53828] Re: Nonlinear Curve Fitting*From*: Antti Penttilä@smc.vnet.net*Date*: Sat, 29 Jan 2005 06:02:36 -0500 (EST)*Organization*: University of Helsinki*References*: <ctcrit$6pu$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

nilaakash wrote: > Dear Friends, > I have tried to fit a nonlinear curve, but failed. I am > giving my points and it's curve equation is > > \!\(y = a \((1 - x\/c)\)\^b\) > > Here a, b, c are fit parameters. My initial guess is like > a = 0.3 > b = 0.2 > c = 385.2 > > data={{382.55, 0.112531}, {382.351, 0.113271}, {382.15, 0.115013}, > {381.95, ... Needs[ "Statistics`NonlinearFit`"] NonlinearRegress[ data, y, {x}, {{a, 0.3}, {b, 0.2}, {c, 385.2}}] Part of the output: BestFitParameters -> {a -> 0.318854, b -> 0.204693, c -> 384.614} -- Antti Penttilä Antti.I.Penttila at helsinki.fi.removethis