Missing Value Considerations

Variable with a missing value is used in a calculation

• To treat missing values like null, the Include Missing checkbox should be un-checked
• To use a missing value in a calculation, the Include Missing checkbox should be checked (not common)

Variable with a missing value is used in a dependency or interval expression

• The default is to treat a missing value like a null value; if that is the desired behavior, no additional steps are needed
• To use the missing value append the variable code with .getValue(true)
  • Example:  showVar(#reason.getControl(), #labValue.getValue(true)==-9);