calcslice {emdbook}R Documentation

Negative log-likelihood slice

Description

Calculate the negative log-likelihood along a line connecting two mle fits

Usage

calcslice(fit1, fit2, fn = fit1@minuslogl, range = c(-0.1, 1.1), n = 400)

Arguments

fit1 An mle object
fit2 Another mle object
fn Negative log-likelihood function
range Numeric vector: range of parameters to try, where 0 corresponds to coef(fit1) and 1 corresponds to coef(fit2)
n Number of points to evaluate

Details

Calculates the negative log-likelihood (not a profile, just a "slice") along the line connecting the two sets of coefficients. Intended for diagnosing and visualizing multiple minima in a likelihood surface, especially in higher-dimensional models.

Value

x Parameter values, along the 0-1 scale described above
y Negative log-likelihood values

Author(s)

Ben Bolker


[Package emdbook version 1.1.1.1 Index]