Re: ncl-talk Digest, Vol 95, Issue 5

Ugo, for adding 2 hours, I would find the NCL date functions more
useful. You might look over this. It's what I use often:
$ cat timetest.ncl
date1String=systemfunc( "date +%Y%m%d%H" )
print("given string as YYYYMMDDHH is "+date1String)

yearInt = stringtointeger( str_get_cols( date1String, 0, 3) )
monInt = stringtointeger( str_get_cols( date1String, 4, 5) )
dayInt = stringtointeger( str_get_cols( date1String, 6, 7) )
hrInt = stringtointeger( str_get_cols( date1String, 8, 9) )
timeUnits = "hours since 1800-01-01 00:00:00"

date1Time = ut_inv_calendar( yearInt, monInt, dayInt, hrInt, 0, 0,
timeUnits, 0 )

; since date1Time has the units "hours since ..." the 2 here adds 2 hours
date2Time = date1Time + 2
date2Time@units = timeUnits
;print(date2Time@units)

date2Int = ut_calendar( date2Time, -3 )
;print(date2Int)

date2String=sprinti ( "%0.8i", date2Int )
;print(date2String)

ymd2String=str_get_cols ( date2String, 0, 7 )
hr2String =str_get_cols ( date2String, 8, 9 )

newDate2String=systemfunc( "date -d '"+ymd2String+" "+hr2String+"' '+%A,
%d/%m/%Y %H'" )
print("new string is "+newDate2String)

;date -d "20111004 05" +"%A, %d/%m/%Y"

$ ncl timetest.ncl
  Copyright (C) 1995-2011 - All Rights Reserved
  University Corporation for Atmospheric Research
  NCAR Command Language Version 6.0.0
  The use of this software is governed by a License Agreement.
  See http://www.ncl.ucar.edu/ for more details.
(0) given string as YYYYMMDDHH is 2011100414
(0) new string is Tuesday, 04/10/2011 16
$

On 10/4/11 1:00 PM, ncl-talk-request@ucar.edu wrote:
> Date: Mon, 3 Oct 2011 19:00:46 +0000
> From: ugo merlini<ugomerlini@hotmail.com>
> Subject: Coverting date format was: Problems with Ut_string
> To:<ncl-talk@ucar.edu>
> Message-ID:<DUB108-W421534FE7D84406AC15C56CAFA0@phx.gbl>
> Content-Type: text/plain; charset="iso-8859-1"
>
>
> Hi
>
> I would like to convert the date format from the standard one to
>
> date -d "20111002 03 +2 hour" +"%A, %d/%m/%Y ore %H"
>
> I write a little script
>
> can someone help to go to the right way?
>
> is better to use internal NCL function instead of Unix shell command?
>
> Regards
>
> Ugo
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Received on Tue Oct 4 13:30:01 2011