Generally, it's also taken to give results in the correct quadrant. Compare
1%1 and _1%_1.
On Mon, 20 Mar 2023, Clifford Reiter 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 <bakerj...@gmail.com> 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
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