On Tue, 08-Jun-2004 at 02:57PM +1200, Richard A. O'Keefe wrote:
|> Rolf Turner <[EMAIL PROTECTED]> attacked:
|> Have you ***any*** evidence that R's procedure degrades
|> performance, under any circumstances? (Apparently not.) In
|> that case why are you goi
ckage.
Daehyok Shin (Peter)
> -Original Message-
> From: Richard A. O'Keefe [mailto:[EMAIL PROTECTED]
> Sent: Monday, June 07, 2004 PM 10:50
> To: [EMAIL PROTECTED]
> Subject: RE: [R] Vectors of years, months, and days to dates?
>
>
> as.Date(c(years, months,
Rolf Turner <[EMAIL PROTECTED]> attacked:
Have you ***any*** evidence that R's procedure degrades
performance, under any circumstances? (Apparently not.) In
that case why are you going on and on about it?
I did the following:
library(ch
much more data run through them, and the time you might
> > save trying to avoid integer to character conversion will/should be eaten
> > up by debugging.
> >
> > >
> > > Daehyok Shin (Peter)
> > > Terrestrial Hydrological Ecosystem Modellers
> > >
Daehyok Shin (Peter) wrote:
> Is what I asked such an exceptional case?
Apparently.
> A lot of data I am dealing with (usually hydrologic data) are
> recorded with three columns of years, months, and days. In my
> opinion, the direct conversion from numeric vectors of years, months
> an
r Bivand [mailto:[EMAIL PROTECTED]
> Sent: Monday, June 07, 2004 PM 1:02
> To: Shin, Daehyok
> Cc: R, Help
> Subject: RE: [R] Vectors of years, months, and days to dates?
>
>
> On Mon, 7 Jun 2004, Shin, Daehyok wrote:
>
> > > > res <- as.POSIXlt(paste(years, mon
Shin, Daehyok email.unc.edu> writes:
>
> Thanks, but, what I want is to convert three vectors of years, months, and
> days directly into POSIXlt or Date objects
> without creating character vectors.
I would probably just convert it to character using paste and from
that to Date as others have a
"Shin, Daehyok" <[EMAIL PROTECTED]> writes:
> Thanks, but, what I want is to convert three vectors of years, months, and
> days directly into POSIXlt or Date objects
> without creating character vectors.
Well, if you insist:
x <- as.POSIXlt(structure(rep(0,2),class="POSIXct"))
x$year <- years-
om: Roger Bivand [mailto:[EMAIL PROTECTED]
> > Sent: Monday, June 07, 2004 PM 12:20
> > To: Daehyok Shin
> > Cc: R, Help
> > Subject: Re: [R] Vectors of years, months, and days to dates?
> >
> >
> > On Mon, 7 Jun 2004, Daehyok Shin wrote:
> >
&
Prof Brian Ripley <[EMAIL PROTECTED]> writes:
> On Mon, 7 Jun 2004, Shin, Daehyok wrote:
>
> > The interface for dates in R is a little confusing to me.
> > I want to create a vector of Date objects from vectors of years, months, and
> > days.
> > One solution I found is:
> >
> > years <- c(1991
"Shin, Daehyok"
>
> <[EMAIL PROTECTED]To: "R,
> Help" <[EMAIL PROTECTED]>
> >cc:
>
> Sent by: Subject: [R]
> Vectors of ye
"We can do no great things,
only small things with great love."
- Mother Teresa
> -Original Message-
> From: Roger Bivand [mailto:[EMAIL PROTECTED]
> Sent: Monday, June 07, 2004 PM 12:20
> To: Daehyok Shin
> Cc: R, Help
> Subject: Re:
On Mon, 7 Jun 2004, Daehyok Shin wrote:
> How can I create POSIXlt directly from the numbers?
> I failed to find the solution from help documents.
?POSIXlt
?as.POSIXlt:
> res <- as.POSIXlt(paste(years, months, days, sep="-"))
> str(res)
`POSIXlt', format: chr [1:2] "1991-01-01" "1992-10-02"
> r
How can I create POSIXlt directly from the numbers?
I failed to find the solution from help documents.
Daehyok
--On Monday, June 07, 2004 4:44 PM +0100 Prof Brian Ripley
<[EMAIL PROTECTED]> wrote:
On Mon, 7 Jun 2004, Shin, Daehyok wrote:
The interface for dates in R is a little confusing to me.
I
On Mon, 7 Jun 2004, Shin, Daehyok wrote:
> The interface for dates in R is a little confusing to me.
> I want to create a vector of Date objects from vectors of years, months, and
> days.
> One solution I found is:
>
> years <- c(1991, 1992)
> months <- c(1, 10)
> days <- c(1, 2)
>
> dates <- as
The interface for dates in R is a little confusing to me.
I want to create a vector of Date objects from vectors of years, months, and
days.
One solution I found is:
years <- c(1991, 1992)
months <- c(1, 10)
days <- c(1, 2)
dates <- as.Date(ISOdate(years, months, days))
But, in this solution the
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