Sign[x]x が負,ゼロ,正のときに,それぞれ,,を与える.
Signはリストに対して要素単位で適用される:
Abs Arg UnitStep Piecewise Clip Positive Negative NonNegative Greater Simplify Assumptions Normalize
400+ new features, including the new Wolfram Predictive Interface, social network analysis, enterprise CDF deployment, and more »