summary.posterior_diff {tidyposterior} | R Documentation |
Summarize Posterior Distributions of Model Differences
Description
Credible intervals are created for the differences. Also, region of practical equivalence (ROPE) statistics are computed when the effective size of a difference is given.
Usage
## S3 method for class 'posterior_diff'
summary(object, prob = 0.9, size = 0, ...)
Arguments
object |
An object produced by |
prob |
A number p (0 < p < 1) indicating the desired probability mass to include in the intervals. |
size |
The size of an effective difference in the units of the chosen
metric. For example, a 5 percent increase in accuracy ( |
... |
Not currently used |
Details
The ROPE estimates included in the results are the
columns pract_neg
, pract_equiv
, and pract_pos
. pract_neg
integrates the portion of the posterior below -size
(and
pract_pos
is the upper integral starting at size
). The
interpretation depends on whether the metric being analyzed is
better when larger or smaller. pract_equiv
integrates between
[-size, size]
. If this is close to one, the two models are
unlikely to be practically different relative to size
.
Value
A data frame with interval and ROPE statistics for each comparison.
Examples
data("ex_objects")
summary(contrast_samples)
summary(contrast_samples, size = 0.025)