In SAS, how can I assign serial numbers to observations in a data set?

To assign serial numbers to observations in a data set in SAS, create a variable using _N_, a system variable, which contains observation numbers from 1 through n. Consider the following example:

  DATA market_new;
  SET mydata_old;
      id = _N_;  
  RUN;

Here, id = _N_; copies observation numbers to the variable id.

If you have questions about using statistical and mathematical software at Indiana University, contact Research Analytics. Research Analytics is located on the IU Bloomington campus at Woodburn Hall 200; staff are available for consultation Monday-Friday 9am-noon and by appointment.

This is document adxp in the Knowledge Base.
Last modified on 2015-06-19 00:00:00.

  • Fill out this form to submit your issue to the UITS Support Center.
  • Please note that you must be affiliated with Indiana University to receive support.
  • All fields are required.

Please provide your IU email address. If you currently have a problem receiving email at your IU account, enter an alternate email address.

  • Fill out this form to submit your comment to the IU Knowledge Base.
  • If you are affiliated with Indiana University and need help with a computing problem, please use the I need help with a computing problem section above, or contact your campus Support Center.

Please provide your IU email address. If you currently have a problem receiving email at your IU account, enter an alternate email address.