NBjacobianPsi {RCM} | R Documentation |
Jacobian for the psi of a given dimension
NBjacobianPsi(beta, X, reg, muMarg, theta, preFabMat)
beta |
a scalar, the current estimate |
X |
the n-by-p count matrix |
reg |
the regressor matrix, the outer product of current row and column scores |
muMarg |
the nxp offset matrix |
theta |
a n-by-p matrix with the dispersion parameters |
preFabMat |
a prefab matrix, (1+X/thetas) |
The evaluation of the jacobian function at beta, a 1-by-1 matrix