|MATLAB Function Reference|
Y = atan(X)
returns the inverse tangent (arctangent) for each element of
X. For real elements of
atan(X) is in the range .
atan function operates element-wise on arrays. The function's domains and ranges include complex values. All angles are in radians.
Graph the inverse tangent function over the domain .
The inverse tangent can be defined as
atan uses FDLIBM, which was developed at SunSoft, a Sun Microsystems, Inc. business, by Kwok C. Ng, and others. For information about FDLIBM, see http://www.netlib.org.