scale_date

0th

Percentile

Position scales for date/time data

These are the default scales for the three date/time class. These will usually be added automatically. To override manually, use scale_*_date for dates (class Date), scale_*_datetime for datetimes (class POSIXct), and scale_*_time for times (class hms).

Usage
scale_x_date(
  name = waiver(),
  breaks = waiver(),
  date_breaks = waiver(),
  labels = waiver(),
  date_labels = waiver(),
  minor_breaks = waiver(),
  date_minor_breaks = waiver(),
  limits = NULL,
  expand = waiver(),
  guide = waiver(),
  position = "bottom",
  sec.axis = waiver()
)

scale_y_date( name = waiver(), breaks = waiver(), date_breaks = waiver(), labels = waiver(), date_labels = waiver(), minor_breaks = waiver(), date_minor_breaks = waiver(), limits = NULL, expand = waiver(), guide = waiver(), position = "left", sec.axis = waiver() )

scale_x_datetime( name = waiver(), breaks = waiver(), date_breaks = waiver(), labels = waiver(), date_labels = waiver(), minor_breaks = waiver(), date_minor_breaks = waiver(), timezone = NULL, limits = NULL, expand = waiver(), guide = waiver(), position = "bottom", sec.axis = waiver() )

scale_y_datetime( name = waiver(), breaks = waiver(), date_breaks = waiver(), labels = waiver(), date_labels = waiver(), minor_breaks = waiver(), date_minor_breaks = waiver(), timezone = NULL, limits = NULL, expand = waiver(), guide = waiver(), position = "left", sec.axis = waiver() )

scale_x_time( name = waiver(), breaks = waiver(), minor_breaks = waiver(), labels = waiver(), limits = NULL, expand = waiver(), oob = censor, na.value = NA_real_, guide = waiver(), position = "bottom", sec.axis = waiver() )

scale_y_time( name = waiver(), breaks = waiver(), minor_breaks = waiver(), labels = waiver(), limits = NULL, expand = waiver(), oob = censor, na.value = NA_real_, guide = waiver(), position = "left", sec.axis = waiver() )

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.

breaks

One of:

  • NULL for no breaks

  • waiver() for the breaks specified by date_breaks

  • A Date/POSIXct vector giving positions of breaks

  • A function that takes the limits as input and returns breaks as output

date_breaks

A string giving the distance between breaks like "2 weeks", or "10 years". If both breaks and date_breaks are specified, date_breaks wins.

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

date_labels

A string giving the formatting specification for the labels. Codes are defined in strftime(). If both labels and date_labels are specified, date_labels wins.

minor_breaks

One of:

  • NULL for no breaks

  • waiver() for the breaks specified by date_minor_breaks

  • A Date/POSIXct vector giving positions of minor breaks

  • A function that takes the limits as input and returns minor breaks as output

date_minor_breaks

A string giving the distance between minor breaks like "2 weeks", or "10 years". If both minor_breaks and date_minor_breaks are specified, date_minor_breaks wins.

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.

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.

sec.axis

sec_axis() is used to specify a secondary axis.

timezone

The timezone to use for display on the axes. The default (NULL) uses the timezone encoded in the data.

oob

One of:

na.value

Missing values will be replaced with this value.

See Also

sec_axis() for how to specify secondary axes

Other position scales: scale_x_binned(), scale_x_continuous(), scale_x_discrete()

Aliases
  • scale_x_date
  • scale_y_date
  • scale_x_datetime
  • scale_y_datetime
  • scale_x_time
  • scale_y_time
Examples
# NOT RUN {
last_month <- Sys.Date() - 0:29
df <- data.frame(
  date = last_month,
  price = runif(30)
)
base <- ggplot(df, aes(date, price)) +
  geom_line()

# The date scale will attempt to pick sensible defaults for
# major and minor tick marks. Override with date_breaks, date_labels
# date_minor_breaks arguments.
base + scale_x_date(date_labels = "%b %d")
base + scale_x_date(date_breaks = "1 week", date_labels = "%W")
base + scale_x_date(date_minor_breaks = "1 day")

# Set limits
base + scale_x_date(limits = c(Sys.Date() - 7, NA))

# }
Documentation reproduced from package ggplot2, version 3.3.1, License: GPL-2 | file LICENSE

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