rbbox

(/tools/hpmatlab/toolbox/matlab/graphics/rbbox.m)

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RBBOX	Rubberband box.
	RECTF = RBBOX(RECTI, XY) tracks a rubberband box in the current
	figure, initialized with box RECTI, and starting the tracking at
	the point XY.  The mouse button must be held down when RBBOX is
	called.  RBBOX returns with the mouse up button event.  As a 
	result, RBBOX can be used in an M-file, along with 
	WAITFORBUTTONPRESS, to control dynamic behavior.
	RECTF is the rect specified by the initial point of RECTI and its 
	extent is determined by where the mouse up event occurs.
	RECTI, XY, RECTF are in units of the current figure.