[R] cenbox(): Changing Default x-axis Group Labels

[Rich Shepard]

   I've looked at the lattice book and the 'R Graphics Cookbook' without
seeing how to change the labels along the x axis for groups in a box plot,
specifically cenbox().

   The attached example has a main and axes labels with default group labels.
Please point me to a reference on how I can change 'FALSE' and 'TRUE' to
something more easily understood by viewers.

TIA,

Rich
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