Recently I updated my package nlsr and it passed all the usual checks and was uploaded to CRAN. A few days later I got a message that I should "fix" my package as it had failed in "M1max" tests.
The "error" was actually a failure in a DIFFERENT package that was used as an example in a vignette. I fixed it in my vignette with try(). However, I am interested in just where the M1 causes trouble. As far as I can determine so far, for numerical computations, differences will show up only when a package is able to take advantage of extended precision registers in the IEEE arithmetic. I think this means that in pure R, it won't be seen. Packages that call C or Fortran could do so. However, I've not yet got a good handle on this. Does anyone have some small, reproducible examples? (For me, reproducing so far means making a small package and submitting to macbuilder, as I don't have an M1 Mac.) Cheers, John Nash ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
