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Re: ATAN function with two ARGS
- Subject: Re: ATAN function with two ARGS
- From: davidf(at)dfanning.com (David Fanning)
- Date: Mon, 5 Jun 2000 10:23:56 -0600
- Newsgroups: comp.lang.idl-pvwave
- Organization: Fanning Software Consulting
- References: <393BCBCA.28CD7BEC@seadas.bigelow.org>
- Xref: news.doit.wisc.edu comp.lang.idl-pvwave:19878
Ben Tupper (firstname.lastname@example.org) writes:
> If this argument is supplied, ATAN returns the angle whose tangent
> is equal to Y/X. If both arguments are zero, the result is undefined.
Notice they don't say the "result of the function" is
undefined. If they did, I could understand your confusion.
But here they have made a truthful and accurate statement.
*Implying* that they were talking about the result of the
function is an old technical writers trick that allows one
to remain truthful, while still confusing the rift-raft.
You have to read this documentation *much* more carefully,
Ben, if you have any hopes of winning a commission
in the IDL Expert Programmers Association. :-)
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: email@example.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155