The BOXPLOT Procedure

Details

Values specified with the COVERLAY=, OVERLAYSYM=, and OVERLAYSYMHT= options are matched with overlay variables by position in the option value lists. When one of these options is not specified, the associated values are taken from the SYMBOL definitions currently in effect. If an option is specified but lists fewer values than the number of overlay variables, the overlays for the remaining unmatched variables use values from the SYMBOL definitions. SYMBOL1 is used in the box plot, so the SYMBOL definitions associated by default with the overlay plots start with SYMBOL2.

The vertical axis of a box plot is scaled to accommodate each box-and-whisker plot and all the points on any overlaid plots. If the range of overlay variable values is much greater than the range of analysis variable values, the box-and-whisker plots may be compressed and difficult to read.

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