Friedman test unreplicated complete block design error

Question

I\'m having trouble running a Friedman test over my data. I\'m trying to run a Friedman test using this command:

friedman.test(mean ~ isi | expId, data=monoS         


        

Answer 1

I don't get an error if I run your dataset:

   Friedman rank sum test

   data:  mean and isi and expId
   Friedman chi-squared = 17.9143, df = 3, p-value = 0.0004581

However, you have to make sure that expId and isi are coded as factors. Run these commands:

    monoSum$expID$<-factor(monoSum$expID)
    monoSum$isi$<-factor(monoSum$isi)

Then run the test again. This has worked for me with a similar problem.