Thank you, Mike!
On 5/3/07, Michael Sumner <[EMAIL PROTECTED]> wrote:
>
> Hello,
>
> It seems that "danish" is a numeric vector with attributes attached -
> the attribute vector is POSIXct and is the same length as danish.
>
> You can create this from a data frame like this:
>
> x <- data.frame(Date = ISOdate(2007, 5, 1:10), Value = rnorm(10))
> str(x)
> 'data.frame': 10 obs. of 2 variables:
> $ Date :'POSIXct', format: chr "2007-05-01 12:00:00" "2007-05-02
> 12:00:00" "2007-05-03 12:00:00" "2007-05-04 12:00:00" ...
> $ Value: num 1.891 0.741 -0.368 1.701 -0.660 ...
>
> xx <- x$Value
> attr(xx, "times") <- x$Date
> str(xx)
> atomic [1:10] 0.0414 -0.7124 -1.2976 0.3101 0.4343 ...
> - attr(*, "times")='POSIXct', format: chr [1:10] "2007-05-01 12:00:00"
> "2007-05-02 12:00:00" "2007-05-03 12:00:00" "2007-05-04 12:00:00" ...
>
>
> HTH
>
> Cheers, Mike.
>
> > Dear List:
> >
> > I have a simple two-column data set in .csv format, with the first
> column
> > being the date and second column being some value. I use read.csv() to
> > import the data as follows:
> >
> >
> >
> > x <- read.csv("myfile.csv",header=T, dec=".",
> colClasses=c(Date="POSIXct"))
> >
> >
> >
> > The structure of x is:
> >
> >
> >
> > > str(x)
> >
> > `data.frame': 2959 obs. of 2 variables:
> >
> > $ Date:'POSIXct', format: chr "1998-01-01" "1998-01-01" "1998-01-01"
> > "1998-01-01" ...
> >
> > $ Value: num 0.07379 0.07181 0.01555 0.00630 0.00688 ...
> >
> >
> >
> > This is not what I want. Instead, I want the structure to be the same
> as
> > that of the following data set:
> >
> >
> >
> > > str(danish)
> >
> > atomic [1:2167] 1.68 2.09 1.73 1.78 4.61 ...
> >
> > - attr(*, "times")='POSIXct', format: chr [1:2167] "1980-01-02
> 18:00:00"
> > "1980-01-03 18:00:00" "1980-01-04 18:00:00" "1980-01-06 18:00:00" ...
> >
> >
> >
> > "danish" is a data set that the package "evir" comes with.
> >
> >
> > Any help would be appreciated.
> >
> > [[alternative HTML version deleted]]
> >
> >
>
>
>
[[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.
