[R] as.numeric() and POSIXct format

Hi! I'm confused by this: as.numeric(as.POSIXct(518400,origin=2001-01-01)) [1] 978822000 I guess the problem is that as.numeric() assumes a different origin, but cannot find any default origin. How can I get back the seconds from the POSIXct format? In other words, which the inverse

Re: [R] as.numeric() and POSIXct format

as.POSIXct(518400,origin='2001-01-01') [1] 2001-01-07 PST as.POSIXct(as.numeric(as.POSIXct(518400,origin='2001-01-01')),origin='1970-01-01') [1] 2001-01-07 08:00:00 PST On Wed, Aug 24, 2011 at 9:22 AM, Agustin Lobo agustin.l...@ija.csic.eswrote: Hi! I'm confused by this: