Function to evaluate the negative log posterior given a set of logged parameter values and observed BIS values.
log_posterior_neg(lpr, dat, mu, sig, ...)
Numeric vector of negative log-posterior values
logged PK-PD-error parameter values
data frame with columns corresponding to observed time and PD response values.
Mean of prior distribution.
Variance-covariance matrix of prior distribution.
Arguments passed on to log-likelihood.