Internal function to update 2PNO parameters
update_2pno(N, J, Y, Z, as, bs, theta, Kaps, mu_xi, Sigma_xi_inv, mu_theta,
Sigma_theta_inv)The number of observations.
The number of items.
A N by J matrix of item responses.
A matrix N by J of continuous augmented data.
A vector of item discrimination parameters.
A vector of item threshold parameters.
A vector of prior thetas.
A matrix for item thresholds (used for internal computations).
Prior mean for item parameters.
Prior item parameter inverse variance-covariance matrix.
Prior mean for theta.
Prior inverse variance for theta.
A list of item parameters.