scale_x_datetime
From ggplot2 v0.9.3.1
by Hadley Wickham
Position scale, date
Position scale, date
Usage
scale_x_datetime(..., expand = waiver(),
breaks = pretty_breaks(), minor_breaks = waiver()) scale_y_datetime(..., expand = waiver(),
breaks = pretty_breaks(), minor_breaks = waiver())
Arguments
- breaks
- A vector of breaks, a function that given
the scale limits returns a vector of breaks, or a
character vector, specifying the width between breaks.
For more information about the first two, see
continu - minor_breaks
- Either
NULLfor no minor breaks,waiver()for the default breaks (one minor break between each major break), a numeric vector of positions, or a function that given the limits returns a vector of minor breaks. - ...
- common continuous scale parameters:
name,breaks,labels,na.value,limitsandtrans. Seecontinuous_scalefor m - expand
- a numeric vector of length two giving multiplicative and additive expansion constants. These constants ensure that the data is placed some distance away from the axes.
See Also
Other position scales: scale_x_continuous,
scale_x_date,
scale_x_discrete,
scale_x_log10,
scale_x_reverse,
scale_x_sqrt,
scale_y_continuous,
scale_y_date,
scale_y_discrete,
scale_y_log10,
scale_y_reverse, scale_y_sqrt
Examples
start <- ISOdate(2001, 1, 1, tz = "")
df <- data.frame(
day30 = start + round(runif(100, max = 30 * 86400)),
day7 = start + round(runif(100, max = 7 * 86400)),
day = start + round(runif(100, max = 86400)),
hour10 = start + round(runif(100, max = 10 * 3600)),
hour5 = start + round(runif(100, max = 5 * 3600)),
hour = start + round(runif(100, max = 3600)),
min10 = start + round(runif(100, max = 10 * 60)),
min5 = start + round(runif(100, max = 5 * 60)),
min = start + round(runif(100, max = 60)),
sec10 = start + round(runif(100, max = 10)),
y = runif(100)
)
# Automatic scale selection
qplot(sec10, y, data = df)
qplot(min, y, data = df)
qplot(min5, y, data = df)
qplot(min10, y, data = df)
qplot(hour, y, data = df)
qplot(hour5, y, data = df)
qplot(hour10, y, data = df)
qplot(day, y, data = df)
qplot(day30, y, data = df)
# Manual scale selection
qplot(day30, y, data = df)
library(scales) # to access breaks/formatting functions
last_plot() + scale_x_datetime(breaks = date_breaks("2 weeks"))
last_plot() + scale_x_datetime(breaks = date_breaks("10 days"))
library(scales) # to access breaks/formatting functions
last_plot() + scale_x_datetime(breaks = date_breaks("10 days"),
labels = date_format("%d/%m"))
last_plot() + scale_x_datetime(breaks = date_breaks("1 day"),
minor_breaks = date_breaks("2 hour"))Community examples
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