Compute posterior samples of the linear predictor, that is samples before applying any link functions or other transformations. Can be performed for the data used to fit the model (posterior predictive checks) or for new data.
# S3 method for brmsfit
posterior_linpred(
object,
transform = FALSE,
newdata = NULL,
re_formula = NULL,
re.form = NULL,
resp = NULL,
dpar = NULL,
nlpar = NULL,
nsamples = NULL,
subset = NULL,
sort = FALSE,
...
)
An object of class brmsfit
.
(Deprecated) Logical; if FALSE
(the default), samples of the linear predictor are returned.
If TRUE
, samples of transformed linear predictor,
that is, the mean of the posterior predictive distribution
are returned instead (see posterior_epred
for details).
Only implemented for compatibility with the
posterior_linpred
generic.
An optional data.frame for which to evaluate predictions. If
NULL
(default), the original data of the model is used.
NA
values within factors are interpreted as if all dummy
variables of this factor are zero. This allows, for instance, to make
predictions of the grand mean when using sum coding.
formula containing group-level effects to be considered in
the prediction. If NULL
(default), include all group-level effects;
if NA
, include no group-level effects.
Alias of re_formula
.
Optional names of response variables. If specified, predictions are performed only for the specified response variables.
Optional name of a predicted distributional parameter. If specified, expected predictions of this parameters are returned.
Optional name of a predicted non-linear parameter. If specified, expected predictions of this parameters are returned.
Positive integer indicating how many posterior samples should
be used. If NULL
(the default) all samples are used. Ignored if
subset
is not NULL
.
A numeric vector specifying the posterior samples to be used.
If NULL
(the default), all samples are used.
Logical. Only relevant for time series models.
Indicating whether to return predicted values in the original
order (FALSE
; default) or in the order of the
time series (TRUE
).
Further arguments passed to prepare_predictions
that control several aspects of data validation and prediction.
# NOT RUN {
## fit a model
fit <- brm(rating ~ treat + period + carry + (1|subject),
data = inhaler)
## extract linear predictor values
pl <- posterior_linpred(fit)
str(pl)
# }
# NOT RUN {
# }
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