I'm a newb with R and am trying to move from proprietary stats tools to open ones. Hopefully this post might help others doing the same.
I downloaded the R package for Mac and hacked together a couple scripts, but couldn't seem to get the right output. After installing the psych package, I tried the test script included in this thread on the console, but I got similar results to a prior poster: > x [1] "red" "yellow" "blue" "red" > y [1] "red" "blue" "blue" "red" > ck <- cohen.kappa(cbind(x,y)) Error in counts[i, j] <- sum(scores[i, ] == score.levels[j], na.rm = TRUE) : subscript out of bounds In addition: Warning messages: 1: NAs introduced by coercion 2: NAs introduced by coercion Since I got the impression that there may be a version problem, I updated the psych package to the most recent version, 1.0-94 (from source). After this, I tried over and over to run the cohen.kappa command, and still kept getting the same error. So I quit R and restarted it, then went to the package manager and selected the checkbox next to "psych" to load it, and tried to re-run the command. This time I got the expected output: Call: cohen.kappa1(x = x, w = w, n.obs = n.obs, alpha = alpha) Cohen Kappa and Weighted Kappa correlation coefficients and confidence boundaries lower estimate upper unweighted kappa 0.098 0.6 1.10 weighted kappa -0.693 0.0 0.69 Number of subjects = 4 Lesson learned: close and restart the Mac client if you're using the GUI front-end in order for changes to the package manager to take effect. -- View this message in context: http://r.789695.n4.nabble.com/Cohen-s-Kappa-for-beginners-tp2229658p3298061.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.