No, this is not about Rcpp, but a comment in that overly long discussion raised a question that has been in my mind for a while.
This is that one may have work that is used in R in the base functionality and there are improvements that should be incorporated. For me, this concerns the BFGS, Nelder-Mead and CG options of optim(), which are based on the 1990 edition (Pascal codes) of my 1979 book "Compact numerical methods...", which were themselves derived from other people's work. By the time Brian Ripley took that work (with permission, even though not strictly required. Thanks!) there were already some improvements to these same algorithms (mainly bounds and masks) in the BASIC codes of the 1987 book by Mary Walker-Smith and I. However, BASIC to R is not something I'd wish on anyone. Now there are some R packages, including some I've been working on, that do offer improvements on the optim() offerings. I would not say mine are yet fully ready for incorporation into the base, but they are pretty close. Equally I think some of the tools in the base should be deprecated and users encouraged to try other routines. It is also getting more and more important that novice users be provided with sensible guidance and robust default settings and choices. In many areas, users are faced with more choice than is efficient for the majority of problems. My question is: How should such changes be suggested / assisted? It seems to me that this is beyond a simple feature request. Some discussion on pros and cons would be appropriate, and those like myself who are familiar with particular tools can and should offer help. Alternatively, is there a document available in the style "Writing R Extensions" that has a title like "How the R Base Packages are Updated"? A brief search was negative. I'm happy to compete with my own prior work to provide improvements. It would be nice to see some of those improvements become the benchmark for further progress. Best, John Nash ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
