Hello,

 

I want to solve a nonlinear 3SLS problem with "nlsystemfit()". The
equations

are of the form

            y_it = f_i(x,t,theta)

The functions f_i(.) have to be formulated as R-functions. When invoking

"nlsystemfit()" I get the error

 

Error in deriv.formula(eqns[[i]], names(parmnames)) : 

        Function 'f1' is not in the derivatives table

 

Isn't it possible to provide equations in the form

eq1 ~ f1(x,t,theta) etc. to "nlsystemfit()" ?

 

Kind regards,

 

Kilian Plank


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