Graphical Input

Description

locator reads the position of the graphics cursor when the (first) mouse button is pressed. Unless the process is terminated prematurely by the user (see below) at most n positions are determined.

The input process can be terminated prematurely by pressing any mouse button other than the first, or by clicking outside the graphics window.

Usage

locator(n=1)

Value

A list containing x and y components which are the coordinates of the identified points.