[R] A question about optim function in R

[Jeff Newmiller]

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) 


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)
>
>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!.

-- 
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