You are right, tick value list can only be numeric: http://support.sas.com/documentation/cdl/en/grstatgraph/65377/HTML/default/viewer.htm#p1iii02qgue4etn1l7fgxzr388sb.htm#n0tsqph132jy5jn17wfmu2k4xoox The question about boxes would require modification of the box plot statement. Here are the options for that: http://support.sas.com/documentation/cdl/en/grstatgraph/65377/HTML/default/viewer.htm#p1v78jvcpcsd1yn1fd4rjy4ka93d.htm#p0cgw9sqvbjj97n11zr3l80oxdfk It could be possible to conceal the boxes by using the box width option with boxwidth = 0.
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