plotrix (version 2.1-5)

count.overplot: Show overlying points as counts

Description

count.overplot checks for overlying points defined as points separated by a maximum of tol, a two element numeric vector of the x and y tolerance. Defaults to 1/2 of the width of a lower case "o" in the x direction and 1/2 of the height of a lower case "o" in the y direction.

Usage

count.overplot(x,y,tol=NULL,...)

Arguments

x,y

Two numeric data vectors or the first two columns of a matrix or data frame. Typically the x/y coordinates of points to be plotted.

tol

The largest distance between points that will be considered to be overlying.

...

additional arguments passed to plot.

Value

• nil

See Also

cluster.overplot,sizeplot

Examples

xy.mat<-cbind(sample(1:10,200,TRUE),sample(1:10,200,TRUE))
 count.overplot(xy.mat,main="Count overplot test",
  xlab="X values",ylab="Y values")