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anchoringitems
2011 Aug 12
0
testEquatingData (part of ltm package) changes order of columns
...NA, 1, NA),
c(1,1,NA,NA,NA)))
names(anchor) <- c("A1","A2", "A3")
items <- list(as.data.frame(cbind(c(NA, NA, NA, NA, 1), c(NA, NA, NA, 1,
NA), c(1,1,NA,NA,NA)))) #let's assume these are the items that I want to
estimate
datAll <- testEquatingData(items, AnchoringItems = anchor)
Now, after I run the testEquatingData() function, the order of the variables
has been changed to A3, V3, A1, A2, V1, V2, instead of, for example A1, A2,
A3, V1, V2,V3, or V1, V2, V3, A1, A2, A3. Since I am using the constraint
function of the three parameter estimation function [e.g. tp...