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MathGroup Archive 2005

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Re: Coefficients from Fit as a list?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg63412] Re: [mg63396] Coefficients from Fit as a list?
  • From: Marcelle Santos <marcellesantos at yahoo.com>
  • Date: Fri, 30 Dec 2005 02:32:29 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

it may not be the smartest way, but I would try this: 

Suppose I have this set of data:

data = {{4.5, 3.9}, {4.7, 5.0}, {5.8, 9.0},
{3.9,4.5}};

First do the fit...

f = Fit[data, {1, x, x\^2, x\^3, x\^4, x\^5}, x];

...and than create a list with all the coeficients but
the first...

a = Table[f[[i, 1]], {i, 2, Length[f]}];

...and than add the first coeficient...

PrependTo[a, f[[1]]]

...to get the result:

{192.253, -62.3631, -4.804, 1.66484, 0.365264,
-0.0606564}

Does it solve your problem?

Marcelle Soares-Santos





--- LectorZ <lectorz at mail.ru> wrote:

> Hi there,
> 
> How can I store the coefficients from the Fit
> function as a list?
> 
> Thanks,
> 
> LZ
> 
> 


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