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Could someone please provide an example of the use of ::, using sample code and coordinates and showing step-by step the changed content of p, c, origin, xbase, ybase, and any other pertinent variables. I can't seem to follow the example in the XY-pic reference (note 3d, page 7). Thanks & cheers

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closed as not constructive by egreg, Joseph Wright Jan 5 '13 at 22:58

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