bayesmanecfitof models fitted with the brms package
Multiple models fitted with the
bayesnec package are
represented as a
bayesmanecfit object, which contains the original
brmsfit fitted objects, names of non-linear models that
were fitted, model averaging WAIC stats, sample size, mean posterior
no-effect toxicity values (NEC, NSEC or N(S)EC), mean model averaged
predictions on the data scale, model averaged residuals, full posterior
distribution of predicated values, and summary statistics of no-effect
methods(class = "bayesmanecfit") for an overview of
list of fitted model outputs of class
prebayesnecfit for each of the fitted models.
character vector indicating the
name of the successfully fitted models.
data.frame of model fit statistics.
The size of the posterior sample. Information on the priors used in the model.
The model-weighted posterior estimate of the no-effect toxicity estimate.
The model-weighted predicted values for the observed data.
Model-weighted residual values (i.e. observed - w_predicted_y).
list containing model-weighted
posterior predicted values based on the supplied
The summary stats (median and 95% credibility intervals) of w_ne_posterior.
character vector indicating the type of
no-effect toxicity estimate. Where the fitted model(s) are NEC models
(threshold models, containing a step function) the no-effect estimate is
a true no-effect-concentration (
NEC, see Fox 2010). Where the fitted
smooth ECx models with no step function, the no-effect estimate is a
NSEC, see Fisher and Fox 2023).
case of a
bayesmanecfit that contains a mixture of both NEC and
ECx models, the no-effect estimate is a model averaged combination of the NEC
and NSEC estimates, and is reported as the
(see Fisher et al. 2023).
Fisher R, Fox DR (2023). Introducing the no significant effect concentration (NSEC).Environmental Toxicology and Chemistry, 42(9), 2019–2028. doi: 10.1002/etc.5610.
Fisher R, Fox DR, Negri AP, van Dam J, Flores F, Koppel D (2023). Methods for estimating no-effect toxicity concentrations in ecotoxicology. Integrated Environmental Assessment and Management. doi:10.1002/ieam.4809.
Fox DR (2010). A Bayesian Approach for Determining the No Effect Concentration and Hazardous Concentration in Ecotoxicology. Ecotoxicology and Environmental Safety, 73(2), 123–131. doi: 10.1016/j.ecoenv.2009.09.012.