Re: [R] Strating value problem for CG in optim()

: Thursday, June 28, 2012 4:18 PM To: r-help@r-project.org Subject: Re: [R] Strating value problem for CG in optim() Hi, It isn't surprising that convergence results depend on initial par values in a nonlinear optimization problem. There might be local maxima in the landscape defined by

Re: [R] Strating value problem for CG in optim()

Hi, It isn't surprising that convergence results depend on initial par values in a nonlinear optimization problem. There might be local maxima in the landscape defined by your likelihood function and you have to explore it for the proper starting places. One suggestion is to try many differe

[R] Strating value problem for CG in optim()

Dear list-members, I have done optimization of 3 parameters by maximum likelihood method using conjugate gradient as optimizer. Since I have the reported value of the parameters from an article, I can validate the result of the optimized parameters. The problem is that optimizer converges to t