compute_ZIPLN_starting_point: Helper function for ZIPLN initialization.

In PLNmodels: Poisson Lognormal Models

Helper function for ZIPLN initialization.

Description

Fast LM-based starting point for ZIPLN: one multivariate lm.fit for the PLN component and empirical zero rates / binomial GLMs for the ZI component. Replaces the previous per-species pscl::zeroinfl loop.

Usage

compute_ZIPLN_starting_point(Y, X, X0, O, w = NULL)

Arguments

Y	Response count matrix (n × p)
X	Design matrix for the PLN component (n × d)
X0	Design matrix for the ZI component (n × d0, empty matrix(NA,0,0) when unused)
O	Offset matrix in log-scale (n × p)
w	Weight vector of length n (defaults to uniform weights)

Value

Named list: B (d × p), M (n × p), S2 (n × p), R (n × p), B0 (d0 × p)

PLNmodels documentation built on July 27, 2026, 5:09 p.m.