Create 2D data set interactively.

create2dData allows you to interactively create a 2D data set by clicking points in 2D.

create2dData(xyRanges = c(0, 1, 0, 1), setupDevice = TRUE, verb = 1,
    ...)

Arguments

xyRanges	ranges of 2D space (a numeric vector of length 4 giving the xmin, xma, ymin, and ymax limits)
setupDevice	logical flag specifying whether to setup the graphical device. Setting to FALSE enables to call `create2dData' several times getting incrementally more and more points.
verb	verbosity level
...	optinal parameters passed to `points'

Details

The user places points in 2D by clicking in a graphical device, and gets coordinates of the clicked points.

For the usual `X11' device the identification process is terminated by pressing any mouse button other than the first. For the `quartz' device the process is terminated by pressing either the pop-up menu equivalent (usually second mouse button or `Ctrl'-click) or the `ESC' key.

Value

a list of `x' and `y', each holding the coordinates of selected points

See also

identify

Examples

if (interactive()) {
  # create first sample
  xy<-create2dData()
  print(xy)

  # create another sample
  xy2<-create2dData(setupDevice=FALSE,col='red',pch=19)
  print(xy2)
}