ACTIVE Keyword (CATPCA command)

The ACTIVE keyword has the following keywords:

MODEIMPU. Impute missing values on a variable with the most frequent category (mode). When there are multiple modes, the smallest category indicator is used. MODEIMPU is the default.

EXTRACAT. Impute missing values on a variable with an extra category indicator. This implies that objects with a missing value are considered to belong to the same (extra) category.

RANDIMPU. Impute each missing value on a variable with a different random category number based on the marginal frequencies of the categories.

Note that with active treatment of missing values, imputation is done before the analysis starts and thus will affect the quantification and the solution.