https://communities.sas.com/t5/Statistical-Procedures/How-to-measure-erratic-pattern-in-a-data-set/m-p/46150#M2025 This is a very interesting problem, but you need to be more precise in what you mean by peaks and valleys. It would also help if you could say more about what your data are. Thu, 18 Jun 2009 10:58:12 GMT plf515 2009-06-18T10:58:12Z https://communities.sas.com/t5/Statistical-Procedures/How-to-measure-erratic-pattern-in-a-data-set/m-p/46149#M2024 I am trying to do an analysis on how to select a data set statistically which has less peaks and valleys or less erratic pattern. Can someone suggest is there any statistical tool that can help me on this.<BR /> <BR /> I tried with standard deviation but it falied Wed, 17 Jun 2009 21:27:00 GMT https://communities.sas.com/t5/Statistical-Procedures/How-to-measure-erratic-pattern-in-a-data-set/m-p/46149#M2024 deleted_user 2009-06-17T21:27:00Z https://communities.sas.com/t5/Statistical-Procedures/How-to-measure-erratic-pattern-in-a-data-set/m-p/46150#M2025 This is a very interesting problem, but you need to be more precise in what you mean by peaks and valleys. It would also help if you could say more about what your data are. Thu, 18 Jun 2009 10:58:12 GMT https://communities.sas.com/t5/Statistical-Procedures/How-to-measure-erratic-pattern-in-a-data-set/m-p/46150#M2025 plf515 2009-06-18T10:58:12Z