[R] Change Julian function in SPlus to R date code

Adams, Jean jvadams at usgs.gov
Wed Jun 10 14:08:44 CEST 2015


Try looking at the julian() function in base ...

?julian

Jean

On Wed, Jun 10, 2015 at 2:46 AM, roslinazairimah zakaria <
roslinaump at gmail.com> wrote:

> Dear r-users,
>
> I have a code in SPlus which use julian function.  What is the similar code
> used in R?
>
> define.date1<-function(dt1,mt1,mt2,nn,da)
> { mt2<-mt2+1
> start<-julian(mt1, 1, nn, origin=c(month=1, day=1, year=1971))+1
> end<-julian(mt2, 1, nn, origin=c(month=1, day=1, year=1971))+da
> a<-dt1[start:end,]
> am<-as.matrix(a[,5])
> }
>
> I have check the Date package in R but not so sure how to adjust it.
>
> Thank you for any help given.
>
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>
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