perldoc perlfunc
atan2 Y,X
Returns the arctangent of Y/X in the range -pi to
pi.
For the tangent operation, you may use the
"Math::Trig::tan" function, or use the familiar
relation:
sub tan { sin($_[0]) / cos($_[0]) }
you should have said:
$result = atan2($u,$v);
> -----Original Message-----
> From: siren jones [mailto:[EMAIL PROTECTED]]
> Sent: Monday, April 22, 2002 3:20 PM
> To: [EMAIL PROTECTED]
> Subject: Inverse tangent function?
>
>
>
> Trying to figure out what the inverse tangent function is...
> (as in FORTRAN arctan)
>
> Tried using:
>
> $ result = atan2(u/v);
> print "result = $result \n ";
>
> Got error: "Too few arguments".
>
> Any suggestions on either the function or where to look up math
> functions for PERl? Couldn't find it in "Programming PERL",
> by O'reilly.
>
> Thanks in advance.
>
> -s
>
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