R: Negative log-likelihood slice

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 1.3.10 Index]