ggplot2: scale_binned – R documentation

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scale_binned

Positional scales for binning continuous data (x & y)

Description

scale_x_binned() and scale_y_binned() are scales that discretize continuous position data. You can use these scales to transform continuous inputs before using it with a geom that requires discrete positions. An example is using scale_x_binned() with geom_bar() to create a histogram.

Usage

scale_x_binned(
  name = waiver(),
  n.breaks = 10,
  nice.breaks = TRUE,
  breaks = waiver(),
  labels = waiver(),
  limits = NULL,
  expand = waiver(),
  oob = squish,
  na.value = NA_real_,
  right = TRUE,
  show.limits = FALSE,
  trans = "identity",
  guide = waiver(),
  position = "bottom"
)

scale_y_binned(
  name = waiver(),
  n.breaks = 10,
  nice.breaks = TRUE,
  breaks = waiver(),
  labels = waiver(),
  limits = NULL,
  expand = waiver(),
  oob = squish,
  na.value = NA_real_,
  right = TRUE,
  show.limits = FALSE,
  trans = "identity",
  guide = waiver(),
  position = "left"
)

Arguments

`name`	The name of the scale. Used as the axis or legend title. If `waiver()`, the default, the name of the scale is taken from the first mapping used for that aesthetic. If `NULL`, the legend title will be omitted.
`n.breaks`	The number of break points to create if breaks are not given directly.
`nice.breaks`	Logical. Should breaks be attempted placed at nice values instead of exactly evenly spaced between the limits. If `TRUE` (default) the scale will ask the transformation object to create breaks, and this may result in a different number of breaks than requested. Ignored if breaks are given explicetly.
`breaks`	One of: `NULL` for no breaks `waiver()` for the default breaks computed by the transformation object A numeric vector of positions A function that takes the limits as input and returns breaks as output (e.g., a function returned by `scales::extended_breaks()`)
`labels`	One of: `NULL` for no labels `waiver()` for the default labels computed by the transformation object A character vector giving labels (must be same length as `breaks`) A function that takes the breaks as input and returns labels as output
`limits`	One of: `NULL` to use the default scale range A numeric vector of length two providing limits of the scale. Use `NA` to refer to the existing minimum or maximum A function that accepts the existing (automatic) limits and returns new limits Note that setting limits on positional scales will remove data outside of the limits. If the purpose is to zoom, use the limit argument in the coordinate system (see `coord_cartesian()`).
`expand`	For position scales, a vector of range expansion constants used to add some padding around the data to ensure that they are placed some distance away from the axes. Use the convenience function `expansion()` to generate the values for the `expand` argument. The defaults are to expand the scale by 5% on each side for continuous variables, and by 0.6 units on each side for discrete variables.
`oob`	One of: Function that handles limits outside of the scale limits (out of bounds). The default (`scales::censor()`) replaces out of bounds values with `NA`. `scales::squish()` for squishing out of bounds values into range. `scales::squish_infinite()` for squishing infinite values into range.
`na.value`	Missing values will be replaced with this value.
`right`	Should values on the border between bins be part of the right (upper) bin?
`show.limits`	should the limits of the scale appear as ticks
`trans`	For continuous scales, the name of a transformation object or the object itself. Built-in transformations include "asn", "atanh", "boxcox", "date", "exp", "hms", "identity", "log", "log10", "log1p", "log2", "logit", "modulus", "probability", "probit", "pseudo_log", "reciprocal", "reverse", "sqrt" and "time". A transformation object bundles together a transform, its inverse, and methods for generating breaks and labels. Transformation objects are defined in the scales package, and are called `<name>_trans` (e.g., `scales::boxcox_trans()`). You can create your own transformation with `scales::trans_new()`.
`guide`	A function used to create a guide or its name. See `guides()` for more information.
`position`	For position scales, The position of the axis. `left` or `right` for y axes, `top` or `bottom` for x axes.

Examples

# Create a histogram by binning the x-axis
ggplot(mtcars) +
  geom_bar(aes(mpg)) +
  scale_x_binned()

ggplot2

Create Elegant Data Visualisations Using the Grammar of Graphics

v3.3.3

MIT + file LICENSE

Authors

Hadley Wickham [aut] (<https://orcid.org/0000-0003-4757-117X>), Winston Chang [aut] (<https://orcid.org/0000-0002-1576-2126>), Lionel Henry [aut], Thomas Lin Pedersen [aut, cre] (<https://orcid.org/0000-0002-5147-4711>), Kohske Takahashi [aut], Claus Wilke [aut] (<https://orcid.org/0000-0002-7470-9261>), Kara Woo [aut] (<https://orcid.org/0000-0002-5125-4188>), Hiroaki Yutani [aut] (<https://orcid.org/0000-0002-3385-7233>), Dewey Dunnington [aut] (<https://orcid.org/0000-0002-9415-4582>), RStudio [cph, fnd]

Initial release