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
Value
xParameter values, along the 0-1 scale described above
yNegative log-likelihood values
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.