Nothing
change.param <- function(coefficients,design_list){
## get basic parameters
m <- design_list$m
n <- design_list$n
I <- design_list$I
n_sigma <- design_list$n_sigma
q <- design_list$q
## extract different parameter matrices
## basic model parameters, called delta
p.delta <- I*q
if(design_list$RSM){
p.delta <- I+q
}
delta <- coefficients[,1:p.delta,drop=FALSE]
## DIF parameters, called gamma
if(design_list$DSF){
gamma <- coefficients[,(p.delta+1):(p.delta+I*m*q),drop=FALSE]
start.sigma <- p.delta+I*m*q+1
}else{
gamma <- coefficients[,(p.delta+1):(p.delta+I*m),drop=FALSE]
start.sigma <- p.delta+I*m+1
}
## Discrimination parameters, called sigma
sigma <- coefficients[,start.sigma:(start.sigma+n_sigma-1),drop=FALSE]
}
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