I'm running a demo script for a one factor model with ordinal data. I'm using OpenMx 1.4-3532 and R version 3.1.2 (2014-10-31). I get the following error message:
> thresholds <- mxThreshold( vars=c("z1","z2","z3"), nThresh=c(1,1,2),
+ free=TRUE, values=c(-1,0,-.5,1.2) )
Error: could not find function "mxThreshold"
Using "library(help=OpenMx)", "mxThreshold" does not appear. What gives?