Hi Rawnaq,
I understand that you want to know how the rankings are calculated in a Kruskal-Wallis Test. Here's a basic outline of the ranking process:
- Combine all the values from different groups into a single list and sort them in ascending order.
- Assign ranks to each value based on their position in the sorted list.
- If there are tied values, assign them the average of the ranks they would have received if they were not tied.
You can obtain the rankings from the "stats" output argument of the "kruskalwallis" function. It returns the "meanranks" array which conists of the average of the ranks of all observations in each column. You can refer to the following documentation link for more information on the "kruskalwallis" function:
Hope this helps!
