NBjacobianPsi {RCM} | R Documentation

## Jacobian for the psi of a given dimension

### Description

Jacobian for the psi of a given dimension

### Usage

    NBjacobianPsi(beta, X, reg, muMarg, theta, preFabMat)

### Arguments

`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)

### Value

The evaluation of the jacobian function at beta, a 1-by-1 matrix

[Package RCM version 1.2.0 Index]