rectline window_id x 1 y 1 x 2 y 2
The identifer of the window containing the box, an integer ranging from 1 to the number of active windows. The maximum number of windows is 16.
The coordinates of two opposing points of a box. These are real (floating point) numbers.
A curve is generated from the values of a given variable, integrated in strips through the box. The variable is specified via the rect command, and the resultant values are plotted versus the distances along the box. This curve is plotted in the visualization window specified in the rect command.