xyTable
Tabulate repeated x-y points

Description

Given two dimensional points, returns the unique points and their counts.

Usage

xyTable(x, y = NULL, digits)

Arguments

x a numeric vector specifiying the x coordinates of the input points or, if y is omitted, any of the formats accepted by xy.coords:
  • a numeric vector.
  • a 2-column matrix.
  • a complex vector.
  • a list with components x and y.
  • a ts object.
y a numeric vector specifying the y coordinates of the input points. If it is omitted, it is derived from x by calling xy.coords(x).
digits if given (and not NULL), the x and y coordinates are replaced by signif(x, digits) and signif(y, digits) so close points are considered the same.
Value
returns a list giving the unique points and the number of times each is repeated.
xthe x coordinates of the unique points in the input.
ythe y coordinates of the unique points in the input.
numberthe number of times each [x,y] pair is repeated.
See Also
xy.coords
Examples
xyTable(c(5,5,6,6,6,6), c(12,12,13,14,14,14))
Package grDevices version 6.1.1-7
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