MISSING Keyword (GGRAPH command)
The MISSING keyword specifies how missing values are handled when the variable
specification includes an aggregation function. When the variable
specification includes only variables or includes the CASEVALUE function, this keyword does not
affect the treatment of missing values. The graph dataset is unaggregated,
so cases with system- and user-missing values are always included
in the graph dataset.
LISTWISE. Exclude the whole case if any one of the variables in the
variable specification has a missing value. This is the default.
VARIABLEWISE. Exclude a case from the aggregation function if the value
is missing for a particular variable being analyzed. This means that a case is excluded if that
case has a missing value for a variable that is a summary function parameter.
GGRAPH command.