Sign

Author

Eric W. Weisstein
November 29, 2002

This notebook downloaded from http://mathworld.wolfram.com/notebooks/SpecialFunctions/Sign.nb.

For more information, see Eric's MathWorld entry http://mathworld.wolfram.com/Sign.html.

©2005 Wolfram Research, Inc. except for portions noted otherwise

Plots

<<Plot`

Real Axis

PlotDiscontinuous[Sign[x],{x,-1,0,1},
Epilog->{Red,PointSize[.025],Point[{0,0}]},
AxesLabel->TraditionalForm/@{x,Sign[x]}]

Complex Plane

ComplexPlot3D[Sign[z],{z,-5,5},PlotPoints->100]

ComplexContourPlot[Sign[z],{z,-5,5}]//Timing