FREQ
variable ;
The variable that is specified in the FREQ statement identifies a variable in the input data set that contains the frequency of occurrence of each observation. PROC GLMSELECT treats each observation as if it appears n times, where n is the value of the FREQ variable for the observation. If it is not an integer, the frequency value is truncated to an integer. If it is less than 1 or missing, the observation is not used.