fisherinfoP: Fisher information matrix of the Poisson log likelihood.
Description
This function calculates the Fisher information matrix
needed for the estimation of multistate models using the Fisher
scoring algorithm.
Usage
fisherinfoP(mu, X)
Arguments
mu
mu.
X
design matrix.
Value
info.
Details
This function implements the Fisher scoring matrix (i.e., the
second partial derivative of the log partial likelihood with respect
to the components of the regression effect vector beta).