barbs | R Documentation |
(improvement over pencils) used to represent directional ranges. Shape consists of two horizontally reflected parallelograms with a specified angle. The middle segment of the parallelogram represents the provided range.
Parameterized by x0, x1 (range values), y0, y1 (thickness), angle, where angle is between -90 and 90
eg angle of 0 = rectangle angle of 45 = rightward pointing barb angle of -45 = leftward pointing barb
Note: the shape will NOT be necessarily contained inside the box outlined by x0, x1, y0, y1
barbs(x0, y0, x1, y1, angle = 0, ...)
Marcin Imielinski
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