[R] A question about optim function in R

[Rasmus Liland]

Dear Zixuan,

On 2020-07-26 07:36 -0700, Jeff Newmiller wrote:
> On July 26, 2020 7:33:32 AM PDT, Zixuan Qi <zixuan.qi using duke.edu> wrote:
> > Hi,
> > 
> > I encounter a problem in R. My program is as follows.
> > lower <- c(-Inf, -Inf, -Inf, -Inf, 0, 0, 0, -1, -1, -1)
> > upper <- c(Inf, Inf, Inf, Inf, Inf, Inf, Inf, 1, 1, 1)
> > out <- optim(parm, logLik, method='L-BFGS-B', lower=lower, upper=upper, hessian=hessian)

Can you include parm?

> > As you can see, I have restricted 
> > parameter[5], parameter[6] and 
> > parameter[7] to be greater than 0, 
> > but the program error is shown in 
> > the attached picture ('产生' means 
> > 'produce'). The reason for this 
> > error seems to be the limit in the 
> > function does not work. I don't know 
> > why.
> > 
> > Can you help me? Thanks very much!.
> 
> This is not reproducible.
> 
> [1] http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example
> [2] http://adv-r.had.co.nz/Reproducibility.html
> [3] https://cran.r-project.org/web/packages/reprex/index.html (read the vignette) 

Best,
Rasmus

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