as.POSIXct1970: as.POXIXct for number of seconds since the start of 1970.

Description Usage Arguments Details Value Author(s) See Also Examples

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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