as.POXIXct for number of seconds since the start of 1970.

Description

as.POSIXct.numeric requires orgin to be specified. This assumes that is the start of 1970.

Usage

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as.POSIXct1970(x, tz="GMT", ...)

Arguments

x

a numeric vector of times in seconds since the start of 1970. (If x is not numeric, call as.POSIXct.)

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.

Details

o1970 <- strptime('1970-01-01', ' o1970. <- as.POSIXct(o1970) as.POSIXct(x, origin=o1970.)

Value

Returns a vector of class POSIXct.

Author(s)

Spencer Graves

See Also

as.POSIXct, ISOdate, strptime as.Date1970

Examples

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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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