varlist BY varname(varvalue) (ROC command)
The varlist
specifies one or more test result variables. They must be of numeric
type.
The varname
separated
from the varlist
by the word BY
specifies the actual state variable.
It can be of any type and any format. The user must also specify a varvalue
in brackets after the second varname
to define the “positive”
group of the actual state variable. All other valid state values are
assumed to indicate the negative group.