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betanag
2016 Apr 15
0
Difficulty with LRSM Rasch analysis with eRm package in R.
...ying to do an LRSM Rasch analysis for 72-item data. 67 of the
items are binary, and 5 are ternary. I have tried it with and without a
specified matrix, and cannot get it to work.
The primary problems I am having are:
1. Without a matrix, I get an error:
Error in `rownames<-`(`*tmp*`, value = betanames) : length of 'dimnames'
[1] not equal to array extent
This is from these commands:
rGrps = c(rep.int(1, nrow(X)))
results.LRSM <- LRSM(X, mpoints = 1, groupvec = rGrps, se = TRUE)
2. I don't know how to make a design matrix myself. I tried making one
with 1's along the dia...