Edit compound group

A Compound group is formed by applying one of the following calculations to the values of the group members:

• Total
• Average
• Minimum
• Maximum

To create or edit a compound group:

1. On the Edit compound group page, provide a label for the group (or accept the default label).
2. Select the group's members. You can use Search to help you locate the items you want to use as group members. Show all and Show selected enable you to view either all the available items or only the items you have selected. This can be used to help you visualize your selections more clearly.
3. Select the calculation you want to use to derive the group's value.
4. Click Save.

   The compound group appears on the Custom groups page.

Missing values in compound groups

In a compound group, missing values are treated as not existing at all. This is different than having an actual zero value.

• Totals: value+missing=value.
• Averages: ValueA+ValueB+Missing=(ValueA+ValueB)/2 (not 3, because the missing value is ignored).
• Min or Max:
  • Min of 2,3,Missing=2
  • Max of -2,-1,Missing=-1
  • Min/Max of Missing,Missing=Missing