plot_best_chromosome function

Diagnostic plots for seg_basket objects

plot_best_chromosome(x)

plot_cpt_repeated(x, i = nrow(x$basket))

Arguments

• x: A seg_basket() object
• i: index of basket to show

Returns

A ggplot2::ggplot() object

Details

seg_basket() objects contain baskets of candidate changepoint sets.

plot_best_chromosome() shows how the size of the candidate changepoint sets change across the generations of evolution.

plot_cpt_repeated() shows how frequently individual observations appear in the best candidate changepoint sets in each generation.

Examples

# Segment a time series using Coen's algorithm
x <- segment(DataCPSim, method = "coen", num_generations = 3)

# Plot the size of the sets during the evolution
x |>
  as.segmenter() |>
  plot_best_chromosome()

# Segment a time series using Coen's algorithm
x <- segment(DataCPSim, method = "coen", num_generations = 3)

# Plot overall frequency of appearance of changepoints
plot_cpt_repeated(x$segmenter)

# Plot frequency of appearance only up to a specific generation
plot_cpt_repeated(x$segmenter, 5)