trunc.POSIXt {Hmisc} | R Documentation |
trunc.POSIXt
returns the date truncated to the specified unit.
ceiling.POSIXt
returns next ceiling of the date at the unit selected in
units
.
floor.POSIXt
trunk.POSIXt
by another name.
round.POSIXt
returns the date or time value rounded to nearest
specified unit selected in digits
.
trunc.POSIXt
and round.POSIXt
have been extended from
the base
package functions.
ceil(x, units,...) ## Default S3 method: ceil(x, units, ...) ## S3 method for class 'POSIXt' trunc(x, units = c("secs", "mins", "hours", "days", "months", "years"), ...) ## S3 method for class 'POSIXt' ceil(x, units = c("secs", "mins", "hours", "days", "months", "years"), ...) ## S3 method for class 'POSIXt' round(x, digits = c("secs", "mins", "hours", "days", "months", "years"))
x |
date to be floored, ceilinged, truncated, or rounded |
units |
unit to that is is rounded up or down to. |
digits |
same as |
... |
further arguments to be passed to or from other methods. |
An object of class POSIXlt
.
Charles Dupont
Date
POSIXt
POSIXlt
DateTimeClasses
date <- ISOdate(1832, 7, 12) ceil(date, units='months') # '1832-8-1' trunc(date, units='years') # '1832-1-1' round.POSIXt(date, digits='months') # '1832-7-1'