[GRASS-stats] Convert IDL into Julian day

[Roger Bivand]

On Tue, 15 Jan 2008, Matteo Dall'Amico wrote:

> Hello,
> I need to convert IDL Julian day into the date with the normal format (for 
> example: day/month/Year Hour:Minute:Sec)
> Some of the data are as follows:
>
> IDL Julian Day
> 2450449.54167
> 2450449.58333
> 2450449.62500
> 2450449.66667
> 2450449.70833
> 2450449.75000
> 2450449.79167
> 2450449.83333
> 2450449.87500
> 2450449.91667
> 2450449.95833
> 2450450.00000
>
> Does someone know how to do it?

If you are asking about R, try RSiteSearch("julian"), although these do 
seem to be just dates. I guess that your origin is 1 January 4713 B.C.

Roger

> Thanks in advance,
>
> Matteo
>
>
> ---------------------------------
> Matteo Dall'Amico
> PhD candidate
> CUDAM and department of Civil and Environmental Engineering
> Universita' degli Studi di Trento
> Via Mesiano 77 - 38050 Trento - Italy
> email: matteo.dallamico at ing.unitn.it
> Tel. +39 0461 882610
> Fax +39 0461 882672
> ---------------------------------
>

-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no