Description Usage Arguments Value See Also Examples
Function used internally in recovery_irtree
to generate item parameters.
1 2 |
genModel |
Character. The data generating model (either "2012" or "ext"). |
J |
number of items. Can be a vector for multiple traits (e.g., J=c(10,10,10)). |
betas |
Optional list. May have entries |
A matrix with J
rows containing the item parameters for MRS,
ERS, ARS (if genModel != "2012"
), and the target trait.
1 2 3 4 5 6 7 8 9 10 11 | J <- 10
# use defaults
betapar <- mpt2irt:::gen_betas("ext", J = J, betas = NULL)
dat <- generate_irtree_ext(N = 20, J = J, betas = betapar, beta_ARS_extreme = 1)
# modify distribution (truncated normal) from which to draw betas, here for MRS
tmp1 <- list("beta.mrs" = list("mean" = 0,
"sd" = 0.3,
"a" = -2,
"b" = Inf))
betapar <- mpt2irt:::gen_betas("ext", J = J, betas = tmp1)
|
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.