statistics (in the asymmetric and symmetric forms), or is anyone aware
that they might reside in some package? A search in the R archives
does indicate that they are (somehow) part of the CoCo package, but I
would rather not start learning how to transform my data into
CoCo-format in order to access these functions, regardless of whether
the CoCo versions are actually intended for calculating the actual
statistic or for some other package internal purposes, as may
sometimes be the case.
Furthermore, it appears to me that the 'somers2' function in the Hmisc
package applies Somers' D only to 2x2 and not larger tables. Am I
mistaken, or does there exist somewhere else an implementation of the
Somers' D statistic for the more general RxC tables? This was queried
in 1999, but no response seemed then to be forthcoming.