There is a bit of information in this thread: https://stackoverflow.com/questions/46967744/rank-operator-vs-axis-notation
On Wed, Dec 20, 2017 at 4:37 AM, Erling Hellenäs <[email protected]> wrote: > What I found in this paper is that Rank was a concept already in some APL > dialects. It was not new to J. I did not find any direct comparison between > the axis notation and the rank notation which could justify the selection > of the latter for J. /Erling > > > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
