topic Re: Checking linear and Non-Linear trend in proc corr in SAS Programming

Checking linear and Non-Linear trend in proc corr

Sanchit_goyal — Sun, 11 Oct 2020 02:53:20 GMT

Please let me know how do we check whether my data is Linear (to apply Pearson or Spearman) or Non-Linear (to apply Hoeffding).

Re: Checking linear and Non-Linear trend in proc corr

ballardw — Sun, 11 Oct 2020 04:36:52 GMT

Scatterplots are often helpful in conjunction with Proc Corr , which is why there is a Plots=scatter option on the proc statement.

If the plot shows a linear or other shaped trend that you can see then you have your answer.

Spearman correlation does apply for monotonic, or mostly so, non-linear associations as it it based on direction of change of values and not magnitude of change.

Re: Checking linear and Non-Linear trend in proc corr

Ksharp — Sun, 11 Oct 2020 12:30:02 GMT

There is another better statistic to test correlation . @Rick_SAS wrote a blog about it .