Add geom_path_point() and geom_path_line()

[dylanhmorris]

The value of these ggplot geoms is in allowing connected paths in which points do not "interrupt" lines from a different group, or vice versa. See the examples in the docs for the new functions, replicated here via reprex

library(forecasttools)
library(ggplot2)
library(tibble)
data <- tribble(
    ~x,      ~y,   ~z,
     1,       0,  "a",
     2,       0,  "a",
     3,    -0.5,  "a",
     1,    0.01,  "b",
     3,   -.520,  "b",
     2,     0.02,  "b")
    
 # standard approach causes points to "interrupt"
 # lines when overplotted
 ggplot(data, aes(x = x, y = y, color = z)) +
    geom_path(linewidth = 2) +
    geom_point(size = 5)

 # using a single-layer approach fixes this
 ggplot(data, aes(x = x, y = y, color = z)) +
    geom_path_point(linewidth = 2, size = 5)

 # The same is true for `geom_line` and `geom_line_point`
 # multi-layer approach:
 ggplot(data, aes(x = x, y = y, color = z)) +
    geom_line(linewidth = 3) +
    geom_point(size = 5)

 # single-layer approach:
 ggplot(data, aes(x = x, y = y, color = z)) +
    geom_line_point(linewidth = 3, size = 5)

^{Created on 2025-05-19 with reprex v2.1.1}

[Copilot]

Copilot wasn't able to review any files in this pull request.

Files not reviewed (5)

• NAMESPACE: Language not supported
• R/geom_path_point.R: Language not supported
• man/GeomPathPoint.Rd: Language not supported
• man/draw_key_path_point.Rd: Language not supported
• man/geom_path_point.Rd: Language not supported