# By variables for table transpose

Use this option to choose BY variables to enable transpose of data set for modified table formats.

### BY Variables

BY variables are optional (in most reports) variable specifications whose values define groups of observations, such as hour, month, or year. BY variables can enable analyses to be performed separately on different groups as defined by that variable. Choosing a BY variable such as gender (ADSL variable = SEX), for example, groups the subjects by gender and conducts two separate analyses: one for males and one for females.

Alternatively, specifying a BY variable enables you to animate an image so that you can see how response values change according to some grouping, like over time.

### To Specify BY Variables for Transposing Tables:

| 8 | Click to open an Add window (shown below) listing all of the variables in FI and any specified supplemental data set.

| 8 | Select on or more variables and click .

The selected variables are added to the text box (shown below).

| 8 | To delete BY variables, select the desired variable and click .