BOXCHART Statement: ANOM Procedure

Overview: BOXCHART Statement

The BOXCHART statement creates an ANOM chart for group (treatment level) means of response values superimposed with box-and-whisker plots of the measurements in each group. Throughout this chapter, a chart of this type is referred to as an ANOM boxchart. You can use options in the BOXCHART statement to

  • compute decision limits from the data based on a specified parameters, such as the significance level ($\alpha $)

  • tabulate group sample sizes, group means, decision limits, and other information

  • save decision limits in an output data set

  • save group sample sizes and group means in an output data set

  • read decision limits and decision limit parameters from a data set

  • display distinct sets of decision limits for different sets of groups

  • specify one of several methods for calculating quantile statistics (percentiles)

  • control the style of the box-and-whisker plots

  • add block legends and symbol markers to identify special groups

  • clip extreme points to make the chart more readable

  • display vertical and horizontal reference lines

  • control axis values and labels

  • control layout and appearance of the chart

You have two alternatives for producing ANOM boxcharts with the BOXCHART statement:

  • ODS Graphics output is produced if ODS Graphics is enabled, for example by specifying the ODS GRAPHICS ON statement prior to the PROC statement.

  • Otherwise, traditional graphics are produced if SAS/GRAPH® is licensed.

See Chapter 3: SAS/QC Graphics, for more information about producing these different kinds of graphs.