R help - Jun 2017 - 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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Much of R is implemented using C or Fortran. You are on a wild goose chase.
There are contributed packages that you probably ought to investigate before
modifying optim, though.

https://cran.r-project.org/web/views/Optimization.html
-- 
Sent from my phone. Please excuse my brevity.

On June 27, 2017 12:46:44 PM EDT, Tauras Vilgalys <taur.vil at
outlook.com> wrote:
>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!
>
>
>	[[alternative HTML version deleted]]
>
>______________________________________________
>R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.

The codes were taken from the 2nd edition of my book Compact Numerical
Methods for Computers, where they are in Pascal. They were converted by
p2c to c, so are pretty opaque and likely difficult to modify. Moreover,
they are based on 1970s codes I wrote for the first edition. Why not
look at optimr (CRAN) or the more extensive optimrx (R-forge) where
there are calls to pure R versions with improvements in the codes as
well as bounds constraints on parameters for some. If you have
suggestions or queries about the newer codes, contact me off-list and
we'll see what can be done.

JN (who will be at UseR! next week)


On 2017-06-27 12:46 PM, Tauras Vilgalys wrote:
> 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!
> 
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>