[R] Convert Long DOY time format to yyyymmdd hh format

[Jim Lemon]

Hi Ogbos,
Try this:

oodates<-read.table(text="1963 335 0
1963 335 1
1963 335 2
1963 335 3
1963 335 4
1963 335 5
1963 335 6
1963 335 7
1963 335 8
1963 335 9
1996 202 20
1996 202 21
1996 202 22
1996 202 23
1996 203 0
1996 203 1
1996 203 2
1996 203 3
2018 365 20
2018 365 21
2018 365 22
2018 365 23")
oodates$Pdate<-strptime(paste(oodates[,1],oodates[,2],oodates[,3]),
 format="%Y %j %H")

Jim

On Thu, Jan 23, 2020 at 8:24 PM Ogbos Okike <giftedlife2014 using gmail.com> wrote:
>
> Dear Experts,
> I have a data spanning 56 years from 1963 to 2018.
> The datetime format is in DOY hour:
> 1963 335 0
> 1963 335 1
> 1963 335 2
> 1963 335 3
> 1963 335 4
> 1963 335 5
> 1963 335 6
> 1963 335 7
> 1963 335 8
> 1963 335 9
> 1996 202 20
> 1996 202 21
> 1996 202 22
> 1996 202 23
> 1996 203 0
> 1996 203 1
> 1996 203 2
> 1996 203 3
> 2018 365 20
> 2018 365 21
> 2018 365 22
> 2018 365 23
> When I used:
> as.Date(335,origin="1963-01-01"), for the first row, I got:
> [1] "1963-12-02"
> This is the format I want, though it is not yet complete. Time is missing.
>
> Again, I can't be doing this one after the other. I guess you have a
> better way of handling this. I have spent some time trying to get it
> right but I am really stuck. I would be most glad if you could spare
> your busy time to help me again.
>
> Thank you very much for your usual kind assistance.
>
> Best regards
> Ogbos
>
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