[R] Algorithm for calculating McCall's T-scores

Stefan Björk stefan.bjork at gmail.com
Thu Dec 18 21:17:48 CET 2008

I seem to have solved this on my own:

t.score.table <- data.frame(T=10:90,F=pnorm(10:90,mean=50.5,sd=10))
t.score <- function(x) {
  p <- ecdf(x)
  t <- cut(p(x),breaks=c(t.score.table$F,Inf),labels=t.score.table$T)
  t <- as.numeric(levels(t))[as.integer(t)]


2008/12/18 Stefan Björk <stefan.bjork at gmail.com>:
> I'm looking for a function or algorithm for calculating McCall's area
> transformed T-scores, but have not find any. An algorithm is described
> on http://www.visualstatistics.net/Visual Statistics
> Multimedia/normalization.htm, but this seem to be an overly
> complicated procedure for implementing in R.
> /S

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