Re: Time delta

There are many ime/date functions in NCL. See:
   http://www.ncl.ucar.edu/Document/Functions/date.shtml

===
untested
===
   year = 2005
   mon = 1
   day = 1
   hour = 10
   minit= 55

   tunits = "hours since 1800-01-01 00:00" ; arbitrary, *ANY* date is ok

; http://www.ncl.ucar.edu/Document/Functions/Built-in/cd_inv_calendar.shtml

   time = cd_inv_calendar(year,mon,day,hour,minit,0,tunits, 0)
   print(time)

   time24= time - 24
   time24@units = time@units

; http://www.ncl.ucar.edu/Document/Functions/Built-in/cd_calendar.shtml

   date24 = cd_calendar(time24,0)
   print(date24)
===

If you had chosen (say):

   tunits = "seconds since 1800-01-01 00:00"

then

   time24= time - 24*3600

When shifting times, you must be consistent with
the units attribute.

On 12/4/13, 2:22 PM, Marston Johnston wrote:
> Hi,
>
> I'm wondering if NCL can do time difference, or time delta calulations? For
> example,
> I've I have a time 2005,01,01,10,55,0, which is 10:55 on Jan 1st 2005, and
> I want to find out the hour, minute, day, month, and year if I take away of
> add 48 hours, or 24 hours, etc., does NCL have a function for this type of
> calculations?
>
> Sincerely,
> /Marston
>
>
>
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Received on Wed Dec 4 15:02:40 2013