Polychoric/tetronic correlations

noetsi

Fortran must die
#1
If you wanted these you used to have to run a painful macro. Now they apparently are part of the regular sas.

As of Base SAS® version 9.3 and SAS/STAT® version 13.1 there are two new ways to compute polychoric/tetrachoric correlation coefficients: with the new POLYCHORIC option of PROC CORR, and with the PROC IRT. If you have more than two variables, both of these procedures (especially the latter) can be used to supply a matrix of tetrachoric/polychoric correlation coefficients.
http://www.john-uebersax.com/stat/tetra.htm