Re: Nonlinear Curve Fitting
- To: mathgroup at smc.vnet.net
- Subject: [mg53847] Re: Nonlinear Curve Fitting
- From: "Ray Koopman" <koopman at sfu.ca>
- Date: Sat, 29 Jan 2005 06:03:01 -0500 (EST)
- 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={{...}}
r = FindFit[data, a(1-x/c)^b, {{a,.3},{b,.2},{c,385.2}}, x]
{a->0.318854,b->0.204693,c->384.614}
Plot[Evaluate[a(1-x/c)^b/.r],{x,326,382},Prolog->Point/@data];
Looks good to me.