| Functions and CALL Routines |
Returns the arc tangent of the ratio of two numeric variables.
|
ATAN2(argument-1, argument-2)
|
-
argument-1
-
specifies a numeric constant, variable,
or expression.
-
argument-2
-
specifies a numeric constant, variable,
or expression.
The ATAN2 function returns the arc tangent
(inverse tangent) of two numeric variables. The result of this function is
similar to the result of calculating the arc tangent of argument-1 / argument-2, except that the
signs of both arguments are used to determine the quadrant of the result.
ATAN2 returns the result in radians, which is a value between -
![[equation]](images/leqn4.gif)
and
![[equation]](images/leqn5.gif)
. If either of the arguments in ATAN2 is missing, then ATAN2
returns a missing value.
The ATAN2 function is similar to the ATAN
function except that ATAN calculates the arc tangent of the angle from the
value of one argument rather than from two arguments.
|
SAS statements |
Results |
a=atan2(-1, 0.5);
|
-1.107148718
|
b=atan2(6,8);
|
0.6435011088
|
c=atan2(5,-3);
|
2.1112158271
|
Copyright © 2011 by SAS Institute Inc., Cary, NC, USA. All rights reserved.
