1.2.13.1.17. statsmodels.api.Poisson.score_obs

Poisson.score_obs(params)

Poisson model Jacobian of the log-likelihood for each observation

Parameters:

params : array-like

The parameters of the model

Returns:

score : ndarray (nobs, k_vars)

The score vector of the model evaluated at params

Notes

\[\frac{\partial\ln L_{i}}{\partial\beta}=\left(y_{i}-\lambda_{i}\right)x_{i}\]

for observations \(i=1,...,n\)

where the loglinear model is assumed

\[\ln\lambda_{i}=x_{i}\beta\]