LINEHANDLES is the jGraph module of jLab.

 LINEHANDLES  Finds all line and patch handles from a given set of axes.
 
    H=LINEHANDLES returns handles to all lines associated with the current
    axes.
 	 
    H=LINEHANDLES(AX) returns handles to all lines associated with the set
    of axes whose handle is AX.
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    This is part of JLAB --- type 'help jlab' for more information
    (C) 2000--2015 J.M. Lilly --- type 'help jlab_license' for details