PointsInPolygon {ScatterDensity}

PointsInPolygon

Description

Defines a Cls based on points in a given polygon.

Usage

PointsInPolygon(Points, Polygon, PlotIt = FALSE, ...)

Arguments

Points

[1:n,1:2] xy cartesian coordinates of a projection

Polygon

Numerical matrix of 2 columns defining a closed polygon

PlotIt

TRUE: Plots marked points

...

BMUorProjected: Default == FALSE, If TRUE assuming BestMatches of ESOM instead of Projected Points

main: title of plot

Further Plotting Arguments,xlab etc used in Classplot

Details

We assume that polygon is closed, i.e., that the last point connects to the fist point

Value

Numerical classification vector Cls with 1 = outside polygon and 2 = inside polygon

Author(s)

Michael Thrun

See Also

Classplot

Examples

XY=cbind(runif(80,min = -1,max = 1),rnorm(80))
#closed polygon
polymat <- cbind(x = c(0,1,1,0), y = c(0,0,1,1))
#takes sometimes more than 5 sec

Cls=PointsInPolygon(XY,polymat,PlotIt = TRUE)