FREQ   variable   ; 
            
The FREQ statement names a variable that contains the frequency of occurrence of each observation. The GENESELECT procedure
            treats an observation as if it appears 
 times, where 
 is the value of the FREQ variable for the observation. The value of 
 can be fractional to indicate a partial observation. If the value of 
 is close to zero, negative, or missing, the observation is ignored. When the FREQ statement is not specified, each observation
            is assigned a frequency of one.