b = sign(s) : sign of iData object @iData/sign function to return the sign of data sets This function computes the sign of the object 's', i.e -1 for negative values, 0 for null, and +1 for positive values. input: s: object or array (iData) output: b: object or array (iData) ex: b=sign(a); Version: Nov. 27, 2018 See also iData, iData/sign, iData/isreal, iData/isfinite, iData/isnan, iData/isinf, iData/isfloat, iData/isinterger, iData/isnumeric, iData/islogical, iData/isscalar, iData/isvector, iData/issparse