b = atan(s) : computes the arc tangent of iFunc object @iFunc/atan function to compute the inverse tangent of data sets (in radians). input: s: object or array (iFunc) output: b: object or array (iFunc) ex: b=atan(a); Version: Nov. 27, 2018 See also iFunc, iFunc/cos, iFunc/acos, iFunc/sin, iFunc/asin, iFunc/tan, iFunc/atan