Returns the arctangent of its argument.
x (NxK matrix or N-dimensional array) –
y (NxK matrix or N-dimensional array) – containing the arctangents of x in radians.
/* ** Create a sequence with 5 elements starting at -pi and ** increasing by pi/2 */ x = seqa(-pi, pi/2, 5); y = atan(x); print "x = " x; print "y = " y;
After the code above:
-3.142 -1.263 -1.571 -1.004 x = 0.000 y = 0.000 1.571 1.004 3.142 1.263
y will be the same size as x, containing the arctangents of the corresponding elements of x.
For real x, the arctangent of x is the angle whose tangent is x. The result is a value in radians in the range \(-π/2\) to \(+π/2\). To convert radians to degrees, multiply by \(180/π\).
For complex x, the arctangent is defined everywhere except i and -i. If x is complex, y will be complex.