Polar coordinate system for periodic Kodom plots

A convenience wrapper around ggplot2::coord_polar() with defaults appropriate for geom_kodom_periodic(): theta = "x" (time maps to angle), start = pi/2 (x = 0 at 12 o'clock), and direction = -1 (clockwise). Pass clockwise = FALSE for a counter-clockwise layout.

Usage

coord_kodom_periodic(clockwise = TRUE)

Arguments

clockwise

Logical. TRUE (default) places time clockwise from the top, matching the convention of most clock and calendar displays.

Value

A ggplot2::coord_polar() coordinate object.

Examples

# \donttest{
library(ggplot2)
df <- data.frame(
  subject_id = rep(1:5, each = 4),
  time = rep(1:4, 5),
  visit_month = rep(1:4, 5),
  value = rep(1:4, 5),
  hba1c = rep(1:4, 5),
  arm = rep(c("Treatment", "Control"), c(12, 8))
)
ggplot(df, aes(x = visit_month, id = subject_id, colour = hba1c)) +
  geom_kodom_periodic(period = 12) +
  scale_x_continuous(breaks = 1:12, labels = month.abb, limits = c(0, 12)) +
  scale_colour_kodom() +
  coord_kodom_periodic() +
  theme_kodom_periodic()

# }