[Rd] Floating point issue

Dirk Eddelbuettel edd @end|ng |rom deb|@n@org
Mon Jul 11 00:21:48 CEST 2022

On 10 July 2022 at 17:43, Antoine Fabri wrote:
| He is my session info :
| R version 4.1.3 (2022-03-10)
| Platform: aarch64-apple-darwin20 (64-bit)
| Running under: macOS Monterey 12.0.1

Along with the different session infos posted by numerous people who are
unable to replicate your issue (myself included) and a bit more off-line
thinking about I started to suspect you may have an M1 chip. Which this

Tomas and Simon had a deep dive into possible floating point concerns in


I also seem to recall that it was also said somewhere (though apparently not
in that post) that the M1 does not have long double. Post such as this one


seem to suggest that 80 bit accuracy is Intel specific -- so this may in fact
be an issue of sailing too close to the hardware boundary.


dirk.eddelbuettel.com | @eddelbuettel | edd using debian.org

More information about the R-devel mailing list