Yes. https://en.wikipedia.org/wiki/Atan2
-- Raul On Mon, Mar 20, 2023 at 8:31 PM Clifford Reiter <[email protected]> wrote: > > Does atn2 differ from _3&o. ? > > _3 o. _ > > 1.5708 > > _3 o. __ > > _1.5708 > > _3 o. 0 > > 0 > > > > > On Mon, Mar 20, 2023 at 8:16 PM John Baker <[email protected]> wrote: > > > While computing star rise, transit and set times I encountered a need for > > an atn2 verb. This is basically a tweaked arctan verb that handles ratios > > like (arctan a%b) when a and b might be 0. Atn2 is in FORTRAN libraries. I > > ended up rolling my own j verb but surely something so standard must be > > floating around. If anyone has any atn 2’s please post. I like to compare > > implementations for stuff like this. > > > > Jdb > > > > analyzethedatanotthedrivel.org > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
