Description Usage Arguments Details Value Author(s) See Also Examples
View source: R/as.POSIXct1970.R
as.POSIXct.numeric requires orgin to be specified. This assumes that is the start of 1970.
1 | as.POSIXct1970(x, tz="GMT", ...)
|
x |
a numeric vector of times in seconds since the start of 1970. (If
|
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). |
... |
optional arguments to pass to as.POSIXct. |
o1970 <- strptime('1970-01-01', ' o1970. <- as.POSIXct(o1970) as.POSIXct(x, origin=o1970.)
Returns a vector of class POSIXct
.
Spencer Graves
as.POSIXct
,
ISOdate
,
strptime
as.Date1970
1 2 3 4 | sec <- c(0, 1, 60, 3600, 24*3600, 31*24*3600, 365*24*3600)
Sec <- as.POSIXct1970(sec)
all.equal(sec, as.numeric(Sec))
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