[R] date conversion problem

[Abdoulaye Sarr]

Hi Jim,

Thanks for the hint, that makes sense and I'll arrange accordingly.
Best regards,
Abdoulaye

On Thu, Aug 13, 2020 at 8:38 AM Jim Lemon <drjimlemon using gmail.com> wrote:

> Hi Abdoulaye,
> It looks to me as though your offsets are in hours, not days. You can
> get a rough date like this:
>
> time<-c(1569072,1569096,1569120,1569144,
>  1569168,1569192,1569216,1569240)
> time_d<-as.Date("1800-01-01")+time/24
> time_d
> [1] "1979-01-01" "1979-01-02" "1979-01-03" "1979-01-04" "1979-01-05"
> [6] "1979-01-06" "1979-01-07" "1979-01-08"
>
> Jim
>
> On Thu, Aug 13, 2020 at 6:10 PM Abdoulaye Sarr <abdoulayesar using gmail.com>
> wrote:
> >
> > I have dataset with time sine 1800-01-01 and extracted data from 1981 to
> > 2019 and used these lines for the data conversion:
> > > time_d <- as.Date(time, format="%j", origin=as.Date("1800-01-01"))
> > > time_years <- format(time_d, "%Y")
> > > time_months <- format(time_d, "%m")
> > > time_year_months <- format(time_d, "%Y-%m")
> > > head(time_d)
> > [1] "6095-12-22" "6096-01-15" "6096-02-08" "6096-03-03" "6096-03-27"
> > "6096-04-20"
> >
> > As you see these gregorian dates are unrealistic and wonder what I am
> doing
> > wrong?
> > The time from the raw file in Jd are like this:
> >
> > > time
> >    [1] 1569072 1569096 1569120 1569144 1569168 1569192 1569216
> 1569240etc.
> >
> > Hope hint and/or suggestion to solve this.
> >
> > Best regards
> >
> >         [[alternative HTML version deleted]]
> >
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