Good morning All, Just wanted to do quick follow-up on this thread: https://r.789695.n4.nabble.com/There-is-pmin-and-pmax-each-taking-na-rm-how-about-psum-td4647841.html For those (including the R-core team) of you who are interested in a C implementation of psum and pprod there is one in the "kit" package (I am the author) on CRAN. I will continue working on the package in my spare time if I see that users are missing basic functionalities not implemented in base R. Have a great weekend. Kind regards Morgan Jacob [[alternative HTML version deleted]]