UCHART Statement: ANOM Procedure

Overview: UCHART Statement

The UCHART statement creates ANOM charts for group (treatment level) rates, also referred to as ANOM u charts. The rate plotted on a u chart is the number or count of events occurring in a group divided by a measure of the opportunity for an event to occur.

You can use options in the UCHART statement to

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

  • tabulate group summary statistics and decision limits

  • save decision limits in an output data set

  • save group summary statistics 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 on the same chart

  • add block legends and symbol markers to identify special groups

  • superimpose stars at points to represent related multivariate factors

  • 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 u charts with the UCHART 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.