Displaying 3 results from an estimated 3 matches for "optimrx".
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optimr
2016 Oct 09
1
optim(?, method=?L-BFGS-B?) stops with an error
...an interfacing approach like R is very tedious
and prone to omissions and errors.
The good news: I've been working on a revision to optimx, having noted the implementation issues just
mentioned. There is now a package optimr on CRAN, but that's just to reserve the name. The real package
is optimrx on R-forge (dependencies can fail, then the poor maintainer gets "your package doesn't work",
with no hope of fixing it). Moreover, Harry Joe recently pointed out to me a bug and in the last few
weeks I think I've resolved issues where Rvmmin and other packages got NA results when...
2017 Jun 27
2
Finding optim.R function
Hello, could anybody direct me where to find code for optim.R? I was able to find the C code at http://docs.rexamine.com/R-devel/optim_8c.html, but the R version would be easier for me to work with and modify.
Thank you!
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2017 Dec 31
1
Order of methods for optimx
Dear R-er,
For a non-linear optimisation, I used optim() with BFGS method but it
stopped regularly before to reach a true mimimum. It was not a problem
with limit of iterations, just a local minimum. I was able sometimes to
reach better minimum using several rounds of optim().
Then I moved to optimx() to do the different optim rounds automatically
using "Nelder-Mead" and