Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.

[netcdf-java] Writing to a time variable

Hello!

I´m trying to write to a time variable on netcdf-java version 4.3.8.
Maybe a demo code would solve my problem, but I was unable to find
one.  So, can someone tell me if those are the steps to get this
working:

Initially:

* Create a time variable - type double
* Add to this variable attributes "calendar" and "units"

Now let´s say that I want to write today´s date to the variable then:

* Read the variable´s "calendar" and "units" attributes
* Build a CalendarDate object with the "base" date, i.e, the one from
units string
* Build a CalendarDate object with today´s date
* Subtract from today´s date the base date (in miliseconds or days)
* Store the above number on the variable

Is this the right script?

Assuming that the script is right, then I have some more questions:

* according to documentation "units" attribute should be a string of
the form: "days since 1990-01-01 0:0:0"
* Trying to parse this units string with CalendarDate.parseUdunits
does not work.  What method should I use?
* I managed to parse the following string with
CalendarDate.parseUdunits: parseUdunits("gregorian",
"2010-06-05T22:07:03.000Z"), but the result is nil and not a
CalendarDate object.


Going further with the question... I want this time variable to be a
coordinate variable. My measurements are not done on fixed periods,
i.e., I could make a measurements on 2010-01-01, 2010-01-05,
2010-01-06, 2010-01-09, 2010-01-11, etc.  My understanding is that I
should:

* time is an unlimited dimension and I should have a time(time) variable
* Store every measurement date on this variable
* Use the index of the time variable as the dimension for other
variables, so, date 2010-01-06 is the 3rd dimension.

Am I going the right way?


Thank you very much!

-- 
Rodrigo Botafogo



  • 2012 messages navigation, sorted by:
    1. Thread
    2. Subject
    3. Author
    4. Date
    5. ↑ Table Of Contents
  • Search the netcdf-java archives: