  sign
  Builtin Function



      SSyynnooppssiiss
        Return the sign of _A

      SSyynnttaaxx
        sign ( _A )

      DDeessccrriippttiioonn

        For real scalar argument, sign returns:


          1 if A > 0



          0 if A == 0



          -1 if A < 0


     For a complex scalar sign returns:


          A ./ abs (A)


     sign performs its operation on real and complex matrices in an
     element by element fashion.































