MISSING Subcommand (SELECTPRED command)

The MISSING subcommand controls whether user-missing values for categorical variables are treated as valid values. By default, user-missing values for categorical variables are treated as invalid.

• User-missing values for scale variables are always treated as invalid.
• System-missing values for any variables are always treated as invalid.

USERMISSING=EXCLUDE. User-missing values for categorical variables are treated as invalid. This setting is the default.

USERMISSING=INCLUDE. User-missing values for categorical variables are treated as valid values.