| Group: | Mathematical Functions |
| Topic: | Trigonometric Functions |
| See also: | acos acosh asin asinh atan2 atanh cos cosh sin sinh tan tanh |
| Function: | atan | |
| Description: | Returns the arctangent in radian of the elements of an array. |
| Usage: | z = atan(x) | |
| Input: | ||
| x | array | |
| Output: | ||
| z | array | |
x = #(tan(pi/2), 1)~#(0, -1) atan(x)
Content of atan [1,] 1.5708 0 [2,] 0.7854 -0.7854