Formatting Values and Customizing Labels

INSET and INSET2 Statements

Formatting Values and Customizing Labels

By default, each inset statistic is identified with an appropriate label, and each numeric value is printed using an appropriate format. However, you may want to provide your own labels and formats. For example, in Figure 45.1 the default format used for C_p and the process standard deviation prints an excessive number of decimal places. The following statements produce $\bar{X}$ and R charts, each with its own inset. The unwanted decimal places are eliminated and the default specification limits labels are replaced with abbreviations:

   proc shewhart data=wafers;
      xrchart diamtr*batch /
         lsl      = 34.97
         usl      = 35.03
         cframe   = bibg
         cinfill  = ligr
         cconnect = red;
      inset lsl='LSL' usl='USL' / cill   = ywh
                                  pos    = nw
                                  height = 3;
      inset2 cp (6.4) stddev (6.4) / cfill  = ywh
                                     pos    = nw
                                     height = 3;
   run;

The resulting $\bar{X}$ and R charts are displayed in Figure 45.2. You can provide your own label by specifying the keyword for that statistic followed by an equal sign (=) and the label in quotes. The label can have up to 24 characters.

The format 6.4 specified in parentheses after the CP and STDDEV keywords displays those statistics with a field width of six and four decimal places. In general, you can specify any numeric SAS format in parentheses after an inset keyword. You can also specify a format to be used for all the statistics in the INSET statement with the FORMAT= option. For more information about SAS formats, refer to Chapter 14 of SAS Language Reference: Dictionary.

Note that if you specify both a label and a format for a statistic, the label must appear before the format.

Figure 45.2: Formatting Values and Customizing Labels in an Inset

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