Re: [R] question on optim() fn.

Hi Ravi, Thanks a lot for your informations. I think you are right. Without the constraints of the parameters, it's easy to get the "NaN Produced" warning message. The pdfs I worked on are Burr, Lognormal and Inverse Gaussian distributions. Lognormal distribution is ok, but I always have warning

[R] question on optim() fn.

i am trying to use optim() fn in R to estimate mle of my pdf. even though I am able to get the results, but there are always warning message, which says that NaN produced. I am not very sure if I should ignore these warning message since I have got solution without error message. I am wondering