hist.POSIXt | R Documentation |
Method for hist
applied to date or date-time objects.
## S3 method for class 'POSIXt' hist(x, breaks, ..., xlab = deparse1(substitute(x)), plot = TRUE, freq = FALSE, start.on.monday = TRUE, format, right = TRUE) ## S3 method for class 'Date' hist(x, breaks, ..., xlab = deparse1(substitute(x)), plot = TRUE, freq = FALSE, start.on.monday = TRUE, format, right = TRUE)
x |
an object inheriting from class |
breaks |
a vector of cut points or number giving the number of
intervals which |
... |
graphical parameters, or arguments to
|
xlab |
a character string giving the label for the x axis, if plotted. |
plot |
logical. If |
freq |
logical; if |
start.on.monday |
logical. If |
format |
for the x-axis labels. See |
right |
logical; if |
Note that unlike the default method, breaks
is a required argument.
Using breaks = "quarters"
will create intervals of 3 calendar
months, with the intervals beginning on January 1, April 1,
July 1 or October 1, based upon min(x)
as appropriate.
With the default right = TRUE
, breaks will be set
on the last day of the previous period when breaks
is
"months"
, "quarters"
or "years"
. Use
right = FALSE
to set them to the first day of the
interval shown in each bar.
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, 1), ISOdate(2020, 1, 1), "5 years")) rug(.leap.seconds, lwd=2) ## 100 random dates in a 10-week period random.dates <- as.Date("2001/1/1") 70*stats::runif(100) hist(random.dates, "weeks", format = "%d %b")
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