lines.zplot_brma: Add Zplot Density Lines

In RoBMA: Robust Bayesian Meta-Analyses

Add Zplot Density Lines

Description

Adds model-implied density lines to an existing zplot.

Usage

## S3 method for class 'zplot_brma'
lines(
  x,
  plot_type = "base",
  probs = c(0.025, 0.975),
  max_samples = 10000,
  plot_ci = TRUE,
  extrapolate = FALSE,
  from = -6,
  to = 6,
  by = 0.05,
  length.out = NULL,
  col = "black",
  as_data = FALSE,
  ...
)

Arguments

x	a zplot_brma object.
plot_type	graphics system: "base" or "ggplot". Defaults to "base".
probs	quantiles for credible intervals. Defaults to c(.025, .975).
max_samples	maximum posterior samples for density. Defaults to 10000. Use Inf to use all posterior samples.
plot_ci	whether to show credible interval bands. Defaults to TRUE.
extrapolate	whether to remove bias adjustments. Defaults to FALSE.
from, to	z-value range for density. Defaults to -6 and 6.
by	step size for density points. Defaults to 0.05.
length.out	number of density points (alternative to by).
col	line color. Defaults to "black".
as_data	whether to return data instead of plotting. Defaults to FALSE.
...	additional graphical parameters.

Details

When extrapolate = FALSE, the density includes all bias adjustments (PET/PEESE regression, selection weights) representing the fitted model. When extrapolate = TRUE, bias adjustments are removed to show the hypothetical distribution without publication bias. Under selection models, the curve is scaled by inverse selection probability and need not integrate to one.

Value

NULL invisibly for base graphics, ggplot2 layers for ggplot, or a data frame with columns x, y, y_lCI, y_uCI if as_data = TRUE.

See Also

plot.zplot_brma(), hist.zplot_brma()

RoBMA documentation built on May 7, 2026, 5:08 p.m.