ATAN2  ATAN2 Inverse Trigonometric 4-Quadrant Arctangent Function


Usage
 
 Computes the atan2 function for its argument.  The general
 syntax for its use is
 
   y = atan2(y,x)
 
 where x and y are n-dimensional arrays of numerical type.
 Integer types are promoted to the double type prior to
 calculation of the atan2 function. The size of the output depends
 on the size of x and y.  If x is a scalar, then z
 is the same size as y, and if y is a scalar, then z
 is the same size as x.  The type of the output is equal to the type of
 |y/x|.  
 