SETLAB Set data set sample labels

    DATA=SETLAB(DATA,LAB)
    DATA=SETLAB(DATA,PROP)
    PROP=SETLAB(DATA)

 INPUT
    DATA    Data set
    LAB     SDLAB object
    PROP    String property name

 OUTPUT
    DATA    Data set
    PROP    String property name

 DESCRIPTION
 SETLAB sets the sample labels in DATA. If SDLAB object LAB is provided,
 it is stored in the sample property referenced by DATA.lab. By default,
 this is 'class'. The property used as labels may be changed by calling
 SDLAB with a string property name. Only indexed properties (SDLAB
 objects) may be used as labels.
 SDLAB invoked on DATA without additional parameters returns the name of
 property referenced by DATA.lab

 SEE ALSO
 GETLAB