* James Cloos <cloos@jhcloos.com> [2025-05-15 20:15]:
some years ago (how time flies) someone pushed a patch for R (upstream) to stop using nan-with-payload for na. it looks like octave also needs such a change for architectures which support only canonical nans.such as riscv. (and mips?)the respective licenses (2or3 -> 3) would permit any octave patch to borrow from how R now handles na.
I am not familiar with NaN/NA coding in either R or Octave, so I apologise if my comment below is irrelevant.
I found this explanation of the internal representation of NA in R: https://stackoverflow.com/questions/70471859/difference-between-na-real-and-nan/70472081#70472081
It seems that R is still using NaN-with-payload to represent NA internally: https://github.com/wch/r-source/blob/2016493d7e73252d5e0cdf302ea4ba9e814b392f/src/main/arithmetic.c#L90
@JimC, could you please provide more information about the patch you mentioned?
Best, Rafael