Add bracket annotations for statistical comparisons on a ggplot

This function adds bracket annotations and p-value labels to a ggplot, based on t-tests between groups.

Usage

ggbracket(
  plt,
  pad = 0.1,
  offset = 0,
  sig.cutoff = 0.05,
  ci.func = mean_cl_normal
)

Arguments

plt

A ggplot object with a grouping variable mapped to the x-axis.

pad

Numeric, padding value for the annotations.

offset

Numeric, unused in this implementation.

sig.cutoff

Numeric, significance level threshold. Comparisons with p-values below this are annotated.

ci.func

Function to compute confidence intervals, default is mean_cl_normal.

Value

A ggplot object with added annotation segments and text.

Examples

ggbracket(my_plot)
#> Error in ggplot_build(plt): could not find function "ggplot_build"