Suppose that a data set includes a variable called GENDER that takes on the values MALE and FEMALE, and that you want to fit a model to the male data.
1.Press or select File→Data Files from the menu.
2.In the Data Files dialog, under Group Name, select the group for which you want to specify a data set.
3.Press File Name and select the file that contains the data.
4.Press Grouping Variable.
5.In the Choose a Grouping Variable dialog, select GENDER and press OK.
6.Press Group Value.
7.In the Choose Value for Group dialog, select Male and press OK.