Secondary axis for text annotations

Secondary axis for text annotations

Usage

sec_axis_text(
  breaks = function(x) mean(x),
  labels = ggplot2::waiver(),
  name = NULL,
  guide = guide_sec_axis_text(),
  ...
)

Arguments

breaks

A function or numeric vector giving the break position(s) used to anchor the text. Defaults to NULL, which places a single label at the midpoint of the scale — the mean of the limits for continuous scales.

labels

One of:

• A character vector of labels, the same length as breaks

• A function that takes break positions as input and returns labels

name

The name of the secondary axis. Use ggplot2::waiver() to derive the name from the primary axis, or NULL (default) for no name.

guide

A guide object used to render the axis. Defaults to guide_sec_axis_text(), which makes transparent ticks and lines.

...

Additional arguments passed to ggplot2::dup_axis().

Value

A AxisSecondary object for use in the sec.axis argument of scale_x_continuous() or scale_y_continuous().

See also

guide_sec_axis_text(), axis_text(), axis_ticks(), axis_bracket()

Examples

library(ggplot2)
library(dplyr)

set_theme(
  ggrefine::theme_grey(
    panel_heights = rep(unit(50, "mm"), 100),
    panel_widths = rep(unit(75, "mm"), 100),
  )
)

mtcars |>
  ggplot(aes(x = wt, y = mpg, colour = as.factor(gear), fill = as.factor(gear))) +
  scale_colour_discrete(palette = blends::multiply(get_theme()$palette.colour.discrete)) +
  #clip = "off" is required for axis_text, axis_ticks and axis_bracket
  coord_cartesian(clip = "off") +
  #reference lines and shade
  ggscribe::reference_line(xintercept = 2.4) +
  ggscribe::reference_line(yintercept = 12)  +
  ggscribe::panel_shade(
    xmin = 4,
    xmax = 5,
  ) +
  #top axis
  scale_x_continuous(
    sec.axis = ggscribe::sec_axis_text(
      breaks = c(mean(c(4, 5))),
      labels = c("Range"),
      guide = ggscribe::guide_sec_axis_text(
        angle = 90,
      )
    )
  ) +
  ggscribe::axis_bracket(
    position = "top",
    breaks = c(4, 5),
  ) +
  ggscribe::axis_text(
    position = "top",
    breaks = c(2.4),
    labels = c("Threshold"),
  ) +
  #right axis
  ggscribe::axis_text(
    position = "right",
    breaks = 12,
    labels = "Threshold",
  ) +
  #geom
  geom_point() +
  #annotations fit plot
  theme(plot.background = element_rect(colour = "grey92"))
#> Error in ggscribe::axis_bracket(position = "top", breaks = c(4, 5), ): unused argument (position = "top")