Analyzing by Groups

Formatting Group Variables

Usually, SAS formats in SAS/INSIGHT software determine only how data are visually displayed. Group variables, however, can use SAS formats to combine different values into a larger group. For example, suppose you are interested only in approximate depths, not in the exact values of DEPTH. You can use a format to combine the values of DEPTH into three groups:

${DEPTH} \leq 100$
$100 \lt {DEPTH} \leq 300$
300 < DEPTH

Once you have assigned this format to DEPTH, you can assign DEPTH a Group role and use it as described earlier in this section. Each use of DEPTH creates three groups containing values in the three ranges you specified.