Hello R-devel, Best wishes in the new year. I am writing to kindly request new R function so NA_real_ can be more easily detected. Currently if one wants to test for NA_real_ (but not NaN) then extra work has to be done: `is.na(x) & !is.nan(x)` Required functionality is already at C level so to address my request there is not that much to do. Kevin Ushey made a nice summary of current R C api in: https://stackoverflow.com/a/26262984/2490497 Pasting related part below, extra row added by me is a requested feature.
+---------------------+ | C fun | NaN | NA | R fun +---------------------+ | ISNAN | t | t | is.na | R_IsNaN | t | f | is.nan | ISNA | f | t | is.na && !is.nan | R_IsNA | f | t | is.na && !is.nan +---------------------+ +---------------------+ | R fun | NaN | NA | C fun +---------------------+ | is.na | t | t | ISNAN | is.nan | t | f | R_IsNaN +---------------------+ | is.nana | f | t | R_IsNA +---------------------+ Strictly speaking, I am asking for a new R function: is.nana <- function(x) if (typeof(x)=="numeric") .Primitive("is.nana") else .Primitive("is.na") Then probably a copy of C function `do_isnan` as `do_isnana` with a minor change from `R_IsNaN` to `R_IsNA`. Best, Jan Gorecki ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel