[R] Simple rep() question duplicating times and dates.

[John Kane]

Hi Solveig, 
Thanks very much, it's a nice solution and one I had not even begun to think about.  I MUST learn more about dates!


--- On Thu, 11/6/08, Solveig Mimler <Solveig.Mimler at eifer.uni-karlsruhe.de> wrote:

> From: Solveig Mimler <Solveig.Mimler at eifer.uni-karlsruhe.de>
> Subject: Re: Simple rep() question duplicating times and dates.
> To: jrkrideau at yahoo.ca
> Cc: r-help at r-project.org
> Received: Thursday, November 6, 2008, 7:06 AM
> 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
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> 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 at gmail.com>
> Subject: Re: [R] Simple rep() question duplicating times
> and dates.
> To: jrkrideau at yahoo.ca
> Cc: R R-help <r-help at stat.math.ethz.ch>
> Message-ID:
> 
> <45f568c70811050714n4711b370n3947a6c5c4fc393f at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
> 
> On Wed, Nov 5, 2008 at 4:02 PM, John Kane
> <jrkrideau at 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$dates<-rep(dates,each=24)
> 
> 
> Regards,
> Gustaf
> -- 
> Gustaf Rydevik, M.Sci.
> tel: +46(0)703 051 451
> address:Essingetorget 40,112 66 Stockholm, SE
> skype:gustaf_rydevik
> 
> 
> 
> ------------------------------
> 
> Message: 28
> Date: Wed, 5 Nov 2008 07:30:31 -0800 (PST)
> From: John Kane <jrkrideau at yahoo.ca>
> Subject: Re: [R] Simple rep() question duplicating times
> and dates.
> To: Gustaf Rydevik <gustaf.rydevik at gmail.com>
> Cc: R R-help <r-help at stat.math.ethz.ch>
> Message-ID:
> <508556.15957.qm at web38406.mail.mud.yahoo.com>
> Content-Type: text/plain; charset=us-ascii
> 
> I don't have R on this machine to try it but it looks
> good to me.  I had 
> even got as far as seq() but completely missed the use of
> "each". 
> 
> Thanks very much.
> 
> --- On Wed, 11/5/08, Gustaf Rydevik
> <gustaf.rydevik at gmail.com> wrote:
> 
> > From: Gustaf Rydevik <gustaf.rydevik at gmail.com>
> > Subject: Re: [R] Simple rep() question duplicating
> times and dates.
> > To: jrkrideau at yahoo.ca
> > Cc: "R R-help"
> <r-help at stat.math.ethz.ch>
> > Received: Wednesday, November 5, 2008, 10:14 AM
> > On Wed, Nov 5, 2008 at 4:02 PM, John Kane
> > <jrkrideau at yahoo.ca> wrote:
> > >
> > > I want to create a data.frame of time and date
> for a
> > year.  I started with the idea of simply producing two
> > vectors (time and date)
> > >
> > > The first part ( time) is easy.
> > >  rep(1:24, 365)
> > >
> > > But how do I get a series of 24 dates for O1
> January
> > 2005 and repeat this to 31 December 2005.
> > >
> > > It should be easy but I don't see it.
> > >
> > > Thanks
> > 
> > 
> > Hi John,
> > 
> > ?Date leads you to (among other things) ?seq.Date.
> > 
> > Something like this should work:
> > 
> > time<-rep(1:24, 365)
> > 
> dates<-seq(as.Date("01012005",format="%d%m%Y"),as.Date("31122005",format="%d%m%Y"),by=1)
> > TimeFrame<-data.frame(time)
> > TimeFrame$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


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