varlist BY varname(varvalue) (ROC ANALYSIS 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. When /DESIGN PAIR = TRUE, at least two numeric variables must defined in the varlist.