minimizing objective function

Hi, How can I estimate two unknown parameters of a relation by minimizing the object function based on relative area error to parametric domain given by other relation? Thanks, Abera

[Sean de Wolski]

What do you have so far? Have you tried FMINSEARCH? If so, what have you tired it with?

[Abex]

Dear Sean,

Thank you.

Let me explain the problem further. I have a function dα/dt=A*exp(-E/R*T)*(1-α) to be solved using ode45 but A and E are unknown. Now I want to estimate A and E by minimizing relative error area expressed interms of α say F=∑(α(i)-αexp(i))/(Tf-To) where αexp, Tf and To are known.

I used ode45 for initial value of and A and E and obtained α. Now that I face difficulty in minimizing the object function, the algorithm itself.

[Teja Muppirala]

Maybe something like this?

http://www.mathworks.com/matlabcentral/answers/5054-solving-an-ode-with-best-fit-adjustment-to-empirical-observations