statsmodels.genmod.bayes_mixed_glm.PoissonBayesMixedGLM.vb_elbo_grad_base¶ PoissonBayesMixedGLM.vb_elbo_grad_base(h, tm, tv, fep_mean, vcp_mean, vc_mean, fep_sd, vcp_sd, vc_sd)¶ Return the gradient of the ELBO function. See vb_elbo_base for parameters.