Hi John,

I had the same problem yesterday and solved it like following:

seq(ISOdate(Year,Month,Day,Hour), by="hour", length=24*365)

for example: seq(ISOdate(2005,1,1,0), by="hour", length=8760)

Regards,
Solveig 


EIFER
Europäisches Institut für Energieforschung
Institut européen de recherche sur l'énergie
European Institute for Energy Research

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Message: 27
Date: Wed, 5 Nov 2008 16:14:19 +0100
From: "Gustaf Rydevik" <gustaf.rydevik@gmail.com>
Subject: Re: [R] Simple rep() question duplicating times and dates.
To: jrkrideau@yahoo.ca
Cc: R R-help <r-help@stat.math.ethz.ch>
Message-ID:
 <45f568c70811050714n4711b370n3947a6c5c4fc393f@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

On Wed, Nov 5, 2008 at 4:02 PM, John Kane <jrkrideau@yahoo.ca> wrote:
>
> I want to create a data.frame of time and date for a year.  I started 
with the idea of simply producing two vectors (time and date)
>
> The first part ( time) is easy.
>  rep(1:24, 365)
>
> But how do I get a series of 24 dates for O1 January 2005 and repeat 
this to 31 December 2005.
>
> It should be easy but I don't see it.
>
> Thanks


Hi John,

?Date leads you to (among other things) ?seq.Date.

Something like this should work:

time<-rep(1:24, 365)
dates<-seq(as.Date("01012005",format="%d%m%Y"),as.Date("31122005",format="%d%m%Y"),by=1)
TimeFrame<-data.frame(time)
TimeFrame$dates<-rep(dates,each=24)


Regards,
Gustaf
-- 
Gustaf Rydevik, M.Sci.
tel: +46(0)703 051 451
address:Essingetorget 40,112 66 Stockholm, SE
skype:gustaf_rydevik



------------------------------

Message: 28
Date: Wed, 5 Nov 2008 07:30:31 -0800 (PST)
From: John Kane <jrkrideau@yahoo.ca>
Subject: Re: [R] Simple rep() question duplicating times and dates.
To: Gustaf Rydevik <gustaf.rydevik@gmail.com>
Cc: R R-help <r-help@stat.math.ethz.ch>
Message-ID: <508556.15957.qm@web38406.mail.mud.yahoo.com>
Content-Type: text/plain; charset=us-ascii

I don't have R on this machine to try it but it looks good to me.  I had 
even got as far as seq() but completely missed the use of "each". 

Thanks very much.

--- On Wed, 11/5/08, Gustaf Rydevik <gustaf.rydevik@gmail.com> wrote:

> From: Gustaf Rydevik <gustaf.rydevik@gmail.com>
> Subject: Re: [R] Simple rep() question duplicating times and dates.

> Cc: "R R-help" <r-help@stat.math.ethz.ch>
> Received: Wednesday, November 5, 2008, 10:14 AM
> On Wed, Nov 5, 2008 at 4:02 PM, John Kane

> >
> > I want to create a data.frame of time and date for a
> year.  I started with the idea of simply producing two
> vectors (time and date)
> >
> > The first part ( time) is easy.
> >  rep(1:24, 365)
> >
> > But how do I get a series of 24 dates for O1 January
> 2005 and repeat this to 31 December 2005.
> >
> > It should be easy but I don't see it.
> >
> > Thanks
> 
> 
> Hi John,
> 
> ?Date leads you to (among other things) ?seq.Date.
> 
> Something like this should work:
> 
> time<-rep(1:24, 365)
> 
dates<-seq(as.Date("01012005",format="%d%m%Y"),as.Date("31122005",format="%d%m%Y"),by=1)
> TimeFrame<-data.frame(time)
> TimeFrame$dates<-rep(dates,each=24)
> 
> 
> Regards,
> Gustaf
> -- 
> Gustaf Rydevik, M.Sci.
> tel: +46(0)703 051 451
> address:Essingetorget 40,112 66 Stockholm, SE
> skype:gustaf_rydevik


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