PROC FREQ groups a variable's values according to its formatted values. If you assign a format to a variable with a FORMAT statement, PROC FREQ formats the variable values before dividing observations ...

For example, the syntax for the example in the "Getting Started" section is as follows: proc mixed; class Temp Lab Batch; model Cure = Temp; random Lab Temp*Lab Batch(Lab Temp); run; REML is the ...