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RegionFunction

RegionFunction

is an option for plotting functions that specifies the region to include in the plot drawn.

Details

The setting RegionFunction->r specifies that a point should be included in the region when r[args] yields True.
The arguments supplied to r are as follows:

	Plot	x , y
	ParametricPlot	x, y, u or x, y, u, v
	ContourPlot and ListContourPlot	x, y, f
	DensityPlot and ListDensityPlot	x, y, f
	ContourPlot3D and ListContourPlot3D	x, y, z, f
	Plot3D, ListPlot3D, and ListSurfacePlot3D	x, y, z
	ParametricPlot3D	x, y, z, u or x, y, z, u, v

Adaptive refinement is typically used to determine the boundaries of the region specified by RegionFunction.
The boundary of regions defined by RegionFunction is drawn with a style specified by the setting for BoundaryStyle.

Examples

Basic Examples (2)

Plot over an annulus region:

Region cuts in the radial direction:

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