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Changepoint vertical rules geom

Source: R/geoms.R
geom_changepoint.Rd

Draws vertical lines at changepoint locations. Mimics geom_vline but designed to work with the tidy changepoint data frames returned by the package. Can be used as a standalone layer: geom_changepoint(data = cp_df, aes(xintercept = cp)).

Usage

geom_changepoint(
  mapping = NULL,
  data = NULL,
  ...,
  na.rm = FALSE,
  show.legend = NA
)

Arguments

mapping

Set of aesthetic mappings created by ggplot2::aes(). Requires xintercept.

data

A data frame with changepoint information.

...

Other arguments passed to geom_vline.

na.rm

If FALSE, missing values are removed.

show.legend

Whether to show legend.

Value

A ggplot layer.

See also

Other ggplot2 layers: geom_cpt_ci(), geom_cpt_event(), geom_cpt_label(), geom_cpt_region(), geom_cpt_segment(), stat_changepoint()

Examples

library(ggplot2)
set.seed(2026)
d <- data.frame(t = 1:100, y = c(rnorm(50), rnorm(50, 4)))
cp <- data.frame(cp = cpt_detect(d$y, method = "pelt")$changepoints$cp)
ggplot(d, aes(t, y)) + geom_line() +
  geom_changepoint(aes(xintercept = cp), data = cp, colour = "blue")