Variables in the Model Program Variable names are alphanumeric but must start with a letter. The length of a variable name is limited to thirty-two characters for non-SAS data set variables PROC MODEL ...

For example, you can create indicator variables from a categorical variable and incorporate them into the model. PROC PHREG programming statements cannot be used to create or modify the values of the ...

Variables are essential for handling objects and data in a program, and their names can provide helpful clues to understanding the program. Well-chosen names enhance code readability. On the other ...