Re: time axis annotation

This is great, Jeff! I'm looking forward to checking out this module,
and I think it would be really useful in PyNGL/PyNIO.

Dave Brown is hard at work implementing a coordinate subscripting
capability in PyNIO, that is based on some nice work by Juerg
Schmidli. We hope to get this done so we can release the first
open-source version of PyNGL and PyNIO. Our goal is the end of March,
but in programmers' time, that might be more like mid-April.

However, if anybody can't wait that long, and needs access to
something that we've already implemented, then drop me an email. We're
always happy to provide binaries where we can.

--Mary

On Thu, 20 Mar 2008, Jeff Whitaker wrote:

> Mary Haley wrote:
>>
>> Hi Jim,
>>
>> I'm trying to come up with a udunits example, but having difficulty
>> finding the "netcdftime" module you mentioned. Is there some
>> documentation for it?
>
> Mary: It's part of my netcdf4-python module
> (http://code.google.com/p/netcdf4-python/source/browse/trunk/netcdftime/netcdftime.py),
> although it's just a single python file (no C code), so it's easy to extract
> and use separately. It can do conversions between python datetime objects
> and any of the time coordinates/calendars covered in the CF standard. Feel
> free to include it in PyNGL if you wish.
>
> -Jeff
>>
>> I did see another module "nc" that mentions udunits, but I didn't
>> see documentation about how to convert the time values to other units.
>>
>> I'm tempted to try wrapping our own "ut_calendar" function that
>> we have in NCL. See:
>>
>> http://www.ncl.ucar.edu/Document/Functions/Built-in/ut_calendar.shtml
>>
>> Anyway, I went ahead and created an example that shows how to
>> label the time axis. I hard-coded the time-converted units for now (I did
>> this from an NCL script using ut_calendar).
>>
>> The way I did the time axis may be meaningless, but hopefully it
>> illustrates how to do this kind of thing. Let me know if you have
>> other questions.
>>
>> If anybody out there knows of a python module for doing this kind of
>> conversion, please let us know.
>>
>> --Mary
>>
>> On Tue, 18 Mar 2008, James Boyle wrote:
>>
>>> I have looked over the examples and documentation.
>>> I do not find any direct support for a facility to label a time axis with
>>> actual times.
>>> For example. if I have a set of times, 1 , 2, 3 which are 'days since 28
>>> Feb 2006', I can get labels '28 Feb ', '1 Jan', '2 Jan'.
>>>
>>> I have the feeling that this is in the do-it-yourself category, combining
>>> the datetime and time python modules but I figured I'd see if there is
>>> anything I missed.
>>> Probably, to accomodate model calendars one would also need Jeff
>>> Whittaker's netcdftime module.
>>> In any case some examples would be useful. More generalized than ngl11p.py
>>> or meteogram.py.
>>>
>>> --Jim
>>> _______________________________________________
>>> pyngl-talk mailing list
>>> pyngl-talk_at_ucar.edu
>>> http://mailman.ucar.edu/mailman/listinfo/pyngl-talk
>>>
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>
> --
> Jeffrey S. Whitaker Phone : (303)497-6313
> NOAA/OAR/CDC R/PSD1 FAX : (303)497-6449
> 325 Broadway Boulder, CO, USA 80305-3328
>
>
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Received on Fri Mar 21 2008 - 08:38:58 MDT