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
).
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(), 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(), 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(),
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(),
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_,
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_,
position = "left", sec.axis = waiver())
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.
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
A string giving the distance between breaks like "2
weeks", or "10 years". If both breaks
and date_breaks
are
specified, date_breaks
wins.
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
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.
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
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.
A numeric vector of length two providing limits of the scale.
Use NA
to refer to the existing minimum or maximum.
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 expand_scale()
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.
The position of the axis. "left" or "right" for vertical scales, "top" or "bottom" for horizontal scales
specify a secondary axis
The timezone to use for display on the axes. The default
(NULL
) uses the timezone encoded in the data.
Function that handles limits outside of the scale limits
(out of bounds). The default replaces out of bounds values with NA
.
Missing values will be replaced with this value.
sec_axis()
for how to specify secondary axes
Other position scales: scale_x_continuous
,
scale_x_discrete
# 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))
# }
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