maximum likelihood using nlm to estimate 4 variables
Hi I need help
I am new to R and am having problems estimating parameters out of
3stage constrained function.
I have constructed a code as below and my data are two colomns of R_j
and R_m(sample given below). R_j and R_m represents the dependent and
independent variables respectively. The parameters al_j, au_j, b_j ,
and sigma_j need to be estimate and there are no initial estimates to