[R] Bland Altman summary stats for all column combinations

Hello, I have the following data.frame structure(list(Study = structure(c(1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 1

[R] R relative frequency by date and operator

I have the data frame with the following structure Operator Score Date Freq 1 A Crap Apr 20130 2 D Crap Apr 20130 3 J Crap Apr 20130 4 L Crap Apr 20130 5 M Crap Apr 20130 6 A Good Apr 20131 7 D Goo

[R] Comparing Kappa coefficients

I have a simple R script which uses the psych package to calculate cohens kappa (weighted) from a csv file. The csv file has 2 columns of ordinal data - one ranked by an experienced observer and the other by a novice who is undergoing training. What I would like to do is measure kappa for subsets o