How to use the solvers in optimisation tool box for the following equations having equality constraints for least squares minimisation using lsqnonlin command??

How to use the solver in optimisation toolbox..i.e equality constraints and inequality constraints?

I have attached the matlab function and executable code and the datas...

I want to find the optimisation variables y1,y2,y3 which gives the least square error iwith the experimental data...

I find difficult to define the objection function for minimisation of least square optimisation with the experimental data...?

How to define the variables inside the optimisation tool box in matlab..??

Please help me to sort out this problem... Help will be appreciated..

I have attached the files below..

[Alan Weiss]

Is this a school assignment?

Alan Weiss

MATLAB mathematical toolbox documentation

[ruban ramalingam]

No sir... This is the project which I am carrying out..

Actually, I am having three constitutive equations having some variables for material model...

objective function to be defined as

LSE = (Strain experimental - strain theoratical)^2 for all the corresponding data points

I want to find the optimised variables of those constitutive equations which gives the least square error with the experimental data using various solvers available in optimisation toolbox (MATLAB)..