Message-ID: <20091111140425.25aef60c@bossiaea>
Date: 2009-11-11T06:04:25Z
From: Berwin A Turlach
Subject: Unexpected behaviour for as.date()
In-Reply-To: <CEEDLPBNOCMDHIGPLIJLKEBMCGAA.isabella@ghement.ca>
G'day Isabella,
On Tue, 10 Nov 2009 20:11:31 -0800
"Isabella Ghement" <isabella at ghement.ca> wrote:
> I tried the solution you suggested and find that am having problems
> getting R to extract the year from an object created by as.date():
Perhaps it would be best to first clarify what you really need. :)
If you have to extract the year, why go via as.date? Why not just:
R> strsplit("02-MAY-00", "-")[[1]][3]
[1] "00"
R> as.numeric(strsplit("02-MAY-00", "-")[[1]][3])
[1] 0
Or if you have a vector of character strings, each a date in that
format:
R> x <- c("02-MAY-00", "02-MAY-01")
R> sapply(x, function(x) as.numeric(strsplit(x, "-")[[1]][3]))
02-MAY-00 02-MAY-01
0 1
HTH.
Cheers,
Berwin
========================== Full address ============================
Berwin A Turlach Tel.: +61 (8) 6488 3338 (secr)
School of Maths and Stats (M019) +61 (8) 6488 3383 (self)
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