Hello all,

I have seen instructions for conducting post-hoc pairwise comparisons in R 
after running an ANOVA, Kruskal-Wallis Test, or Yuen�s Test.

Is there a method to subset data automatically to run an effect size test 
across different pairs? For example, if I want to run Cohen�s d to examine the 
differences in data between different days of the week. My X variables would be 
the pairs below. (Note that no data was collected on Saturday.) I can subset 
the data manually and apply the effect size to each pair. Is there a way in R 
to create the pairs and run the effect size test all at once?

Monday-Tuesday
Monday-Wednesday
Monday-Thursday
Monday-Friday
Monday-Sunday
Tuesday-Wednesday
Tuesday-Thursday
Tuesday-Friday
Tuesday-Sunday
Wednesday-Thursday
Wednesday-Friday
Wednesday-Sunday
Thursday-Friday
Thursday-Sunday
Friday-Sunday

Any assistance you can provide would be much appreciated.

Thank you,
Giovanna

GIOVANNA BADIA | Assessment Librarian, McGill University | Office of the Dean 
of Libraries | giovanna.ba...@mcgill.ca

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