POSIXct {tis} | R Documentation |
Functions to create objects of classes "POSIXlt"
and
"POSIXct"
representing calendar dates and times.
POSIXct(x, ...) POSIXlt(x, ...) ## S3 method for class 'jul': POSIXct(x, ...) ## S3 method for class 'numeric': POSIXct(x, tz = "", origin, ...) ## S3 method for class 'ti': POSIXct(x, offset = 1, ...) ## Default S3 method: POSIXct(x, ...) ## S3 method for class 'jul': POSIXlt(x, ...) ## S3 method for class 'ti': POSIXlt(x, ...) ## Default S3 method: POSIXlt(x, ...)
x |
An object to be converted. |
tz |
A timezone specification to be used for the conversion,
if one is required. System-specific (see time zones),
but "" is the current timezone, and "GMT" is UTC
(Universal Time, Coordinated). |
origin |
a date-time object, or something which can be coerced by
as.POSIXct(tz="GMT") to such an object. |
offset |
a number between 0 and 1 specifying where in the period
represented by the ti object x the desired time falls.
offset = 1 gives the first second of the period and
offset = 1 the last second, offset = 0.5 the middle
second, and so on. |
... |
other args passed to ISOdatetime (POSIXct.jul and
POSIXct.ti ), as.POSIXct or as.POSIXlt as
appropriate. May include a tz argument as above.
|
The default methods POSIXct.default
and POSIXlt.default
do nothing but call as.POSIXct
and as.POSIXlt
,
respectively. The POSIXct.ti
method can take an offset
argument as explained above, and the POSIXct.jul
method can
handle jul
objects with a fractional part. The ti
and
jul
methods for POSIXlt
just call the POSIXct
constructor and then convert it's value to a POSIXlt
object.
POSIXct
and POSIXlt
return objects of the
appropriate class. If tz
was specified it will be reflected in
the "tzone" attribute of the result.
as.POSIXct
and link{as.POSIXlt}
for the default
conversion functions, and DateTimeClasses for details of the
classes.