search for: aickin

Please forgive me if someone has seen this duplicated email, because I sent the email to the wrong address just now. Hi, all, I'm estimating an inter-rater coefficient, Aickin (1990)'s alpha. It's been a long time for me to figure out how to make it work, but it's still of no avail. The problem seems to be my code with the optim() function. Can anyone help me take a look at the code? Thanks in advance. Best, Charles x3<-c(rep(1:2,10),rep(1,5),rep(2,5)) x...