[Octave-bug-tracker] [bug #37379] atan2 and other trig functions lack documentation

[Michael Godfrey]

URL:
  <http://savannah.gnu.org/bugs/?37379>

                 Summary: atan2 and other trig functions lack documentation
                 Project: GNU Octave
            Submitted by: godfrey
            Submitted on: Tue 18 Sep 2012 12:56:24 AM GMT
                Category: Libraries
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Documentation
                  Status: None
             Assigned to: None
         Originator Name: godfrey
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: Any

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Details:

I have been using atan2(y,x) and finally found a problem that I
might have guessed at sooner.  But on checking the documentation
I found that there is practically none.

It appears that the atan2 function that is used is compliant with
some standards.  But, a few of the cases that caused me
trouble were not included anywhere that I could find.  I was not
aware that: atan2(0, -0)  =>  pi  for example.

So, some checking and documentation is in order.

The attached file shows what I found.  If anyone knows of
better documentation that would be great.  Otherwise the Wikipedia
page plus some additions from the attached file may work

Comments?




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File Attachments:


-------------------------------------------------------
Date: Tue 18 Sep 2012 12:56:24 AM GMT  Name: atan2_def  Size: 3kB   By:
godfrey

<http://savannah.gnu.org/bugs/download.php?file_id=26568>

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