sand_vcov {corncob}

Compute sandwich estimate of variance-covariance matrix

Description

Compute sandwich estimate of variance-covariance matrix

Usage

sand_vcov(mod, numerical = FALSE)

Arguments

mod

an object of class bbdml

numerical

Boolean. Defaults to FALSE. Indicator of whether to use the numeric Hessian and score (not recommended).

Value

Sandwich variance-covariance matrix. \hat{A}^{-1} \hat{B} \hat{A}^{-1}.

Examples

data(soil_phylum_small_otu1)
mod <- bbdml(formula = cbind(W, M - W) ~ DayAmdmt,
phi.formula = ~ DayAmdmt,
data = soil_phylum_small_otu1)
sand_vcov(mod)