NonlinearFit for specific data
- To: mathgroup at smc.vnet.net
- Subject: [mg117779] NonlinearFit for specific data
- From: Alexandre Souza <costamfix at gmail.com>
- Date: Thu, 31 Mar 2011 04:01:55 -0500 (EST)
Dear Group,
I have the following data :
data2 = { {0, 773.59},{30, 2351.12},{60, 4205.8}, {90, 4222.69},{120,
4222.69},{150, 704.328},
{180, 1388.28},{210, 1388.28},{240, 1821.23},{270, 1821.23},{300,
754.109},{330, 773.59},{360, 773.59}};
I want the following curve fit :
NonlinearFit[data2, Exp[ a + b x + c x^2], x, {a, b, c}]
Unfortunatelly I get some "FindFit::sszero
FindMinimum::sszero" message, and the given result is ackward.
I also tried FindFit and NonlinearRegress without success.
Any comment would be very welcome.
Alex