Nonlinear Regression model
- To: mathgroup at smc.vnet.net
- Subject: [mg32303] Nonlinear Regression model
- From: romoscanu at imes.mavt.ethz.ch (Ioan Alexandre Romoscanu)
- Date: Sat, 12 Jan 2002 05:18:14 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
Hello
I have a question about the
NonlinearRegress[Data, Model, Variables,Parameters]
function in Mathematica.
The function is supoosed to find parameters, for given Model, which
best fit the submitted data set.
Can the *model* itself be of a *numerical* nature? In other words, can
the model be smth like
Model[xstart_,theta1_,theta2_]=Findroot[function[x,theta1,theta2]==0,{x,start}]
It seems that this does not work, although it should(?) if one
supplies the Parameters to NonlinearRegress in the form
{theta1,{thetastart1, thetastart2}}, so that no symbolic derivatives
are looked for.
Thanks
AIR