CLASSMISSING Subcommand (CSSELECT command)
CLASSMISSING
is used to control whether user-missing values of classification
(stratification and clustering) variables are treated as valid values.
By default, they are treated as invalid.
EXCLUDE. User-missing values of stratification and cluster variables are treated as invalid. This is the default.
INCLUDE. User-missing values of stratification and cluster variables are treated as valid values.
CSSELECT
always treats user-missing values of measure variables (previous
weight, MOS, size, and rate) as invalid.