| Functions and CALL Routines |
Returns the arc tangent.
-
argument
-
specifies a numeric constant, variable,
or expression.
The ATAN function returns the 2-quadrant
arc tangent (inverse tangent) of the argument. The value that is returned
is the angle (in radians) whose tangent is x
and whose value ranges from -
![[equation]](images/leqn2.gif)
to
![[equation]](images/leqn3.gif)
. If the argument is missing, then ATAN returns a missing
value.
The ATAN function is similar to the ATAN2
function except that ATAN2 calculates the arc tangent of the angle from the
ratio of two arguments rather than from one argument.
|
SAS Statements |
Results |
x=atan(0);
|
0
|
x=atan(1);
|
0.7853981634
|
x=atan(-9.0);
|
-1.460139106
|
Copyright © 2011 by SAS Institute Inc., Cary, NC, USA. All rights reserved.
