Re: [R] use date as x-axis

From: tom soyer <tom.soyer_at_gmail.com>
Date: Thu 19 Oct 2006 - 02:34:28 GMT

Gabor,

Thanks very much for the example. I got it to work!

Tom

On 10/18/06, Gabor Grothendieck <ggrothendieck@gmail.com> wrote:
>
> Make sure that the Date column is actually of class "Date":
>
> DF$Date <- as.Date(DF$Date, "%d-%b-%y")
> plot(DF)
>
> See ?as.Date . Also read the Help Desk article in R News 4/1 to
> learn more about dates.
>
> On 10/18/06, tom soyer <tom.soyer@gmail.com> wrote:
> > Hi,
> >
> > I have the following data in two columns. The first column is the date,
> the
> > second is data.
> >
> > Date Data
> > 3-Jan-95 459.21
> > 4-Jan-95 459.13
> > 5-Jan-95 460.73
> > 6-Jan-95 460.38
> > 9-Jan-95 460.67
> > 10-Jan-95 460.9
> > 11-Jan-95 461.68
> > 12-Jan-95 461.64
> > 13-Jan-95 461.64
> > 16-Jan-95 465.97
> > 17-Jan-95 469.38
> > 18-Jan-95 470.05
> > 19-Jan-95 469.72
> > 20-Jan-95 466.95
> > 23-Jan-95 464.78
> > 24-Jan-95 465.81
> > 25-Jan-95 465.86
> >
> > I would like to used the date as the x-axis and data the y-axis. I tried
> > plot(Data~Date,data=d), where d is the R data frame variable that holds
> the
> > two columns. But something very strange happened, although the graph has
> > dates on the x-axis, the order of these dates are wrong. I searched the
> help
> > file, and realized that I need to tell R explicitly to set the date as
> > x-axis. Unfortunately, this is as far as I got, and I couldn't figure
> out
> > exactly how to do this. Could someone please provide me with an example?
> >
> > Thanks,
> >
> > Tom
> >
> > [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help@stat.math.ethz.ch mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
> >
>

        [[alternative HTML version deleted]]



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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Thu Oct 19 13:16:27 2006

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