b = acosh(s) : computes the inverse hyperbolic cosine of iData object @iData/acosh function to compute the inverse hyperbolic cosine of data sets. input: s: object or array (iData) output: b: object or array (iData) ex: b=acosh(a); Version: Nov. 26, 2018 See also iData, iData/cos, iData/acos, iData/sin, iData/asin, iData/tan, iData/atan