| hist.POSIXt {graphics} | R Documentation |
Method for hist applied to date or date-time objects.
## S3 method for class 'POSIXt':
hist(x, breaks, ...,
xlab = deparse(substitute(x)),
plot = TRUE, freq = FALSE,
start.on.monday = TRUE, format)
## S3 method for class 'Date':
hist(x, breaks, ...,
xlab = deparse(substitute(x)),
plot = TRUE, freq = FALSE,
start.on.monday = TRUE, format)
x |
an object inheriting from class "POSIXt" or "Date". |
breaks |
a vector of cut points or number giving the number of
intervals which x is to be cut into or an
interval specification, one of "days", "weeks",
"months" or "years", plus "secs", "mins",
"hours" for date-time objects.
|
... |
graphical parameters, or arguments to
hist.default such as include.lowest,
right and labels. |
xlab |
a character string giving the label for the x axis, if plotted. |
plot |
logical. If TRUE (default), a histogram is
plotted, otherwise a list of breaks and counts is returned. |
freq |
logical; if TRUE, the
histogram graphic is a representation of frequencies, i.e,
the counts component of the result; if FALSE,
relative frequencies (“probabilities”) are plotted. |
start.on.monday |
logical. If breaks = "weeks", should the
week start on Mondays or Sundays? |
format |
for the x-axis labels. See strptime. |
An object of class "histogram": see hist.
seq.POSIXt, axis.POSIXct, hist
hist(.leap.seconds, "years", freq = TRUE)
hist(.leap.seconds,
seq(ISOdate(1970, 1, 10), ISOdate(2002, 1, 1), "5 years"))
## 100 random dates in a 10-week period
random.dates <- as.Date("2001/1/1") + 70*runif(100)
hist(random.dates, "weeks", format = "%d %b")