Re: [idvusers] IDV Jython, Append to Netcdf?

• To: Don.Murray@xxxxxxxx
• Subject: Re: [idvusers] IDV Jython, Append to Netcdf?
• From: Paul Graham <meteorpaul@xxxxxxxxx>
• Date: Tue, 16 Apr 2013 10:03:34 +1000

Hi Don/Tom,

I think the best solution is to use NCO/CDO or just to keep the files
separate but load them together.

Unfortunately, it seems not enough to simply use a bundle because the
derived fields still have to be calculated every time the bundle is loaded
or some changes are made when working on those fields.  It seems to be much
better to have the derived fields already calculated before they are
loaded.  Perhaps this will not be an issue 10 years into the future with
faster CPU's and much more memory...Although, maybe by then we will all be
working with much larger data sets!

Thanks again for your suggestions,

Paul

On 16 April 2013 00:54, Don Murray (NOAA Affiliate) <don.murray@xxxxxxxx>wrote:

> Hi Paul-
>
> You could also try saving this as a data bundle (zidv) which will
> automatically select all the parameters used to calculate the derived
> variable.  You could unzip the zidv file and rename the netCDF file (named
> data_<something>) to a normal name, or just load it in but make sure you
> set the data type to Gridded Data so it will choose the right type.  That
> would save the download time, but it would still have to calculate the
> derived variable.
>
> Or you could use NCO/CDO to combine the single variable files as Tom
> suggested.  You can also load in multiple files at one time by selecting
> them in the file chooser (Ctrl/Shift-click), but they will be loaded as
> individual datasources.
>
> Don
>
>
> On 4/12/13 1:58 AM, Paul Graham wrote:
>
>> Hi IDV'ers,
>>
>> I'm using the 'exportGridToNetcdf' method to write a grid to a Netcdf
>> file,
>> eg.
>>
>>    exportGridToNetcdf(outField, "out.nc")
>>
>> but I have more than one grid I want to write to the file.  Is there a way
>> I can use this method or is there another method I can use?  For example,
>> can I append to a Netcdf file?
>>
>> Thanks in advance,
>>
>> Paul
>> ______________________________**_________________
>> idvusers mailing list
>> idvusers@xxxxxxxxxxxxxxxx
>> For list information, to unsubscribe, visit: http://www.unidata.ucar.edu/
>> **mailing_lists/ <http://www.unidata.ucar.edu/mailing_lists/>
>>
>>
> --
> Don Murray
> NOAA/ESRL/PSD and CIRES
> 303-497-3596
> http://www.esrl.noaa.gov/psd/**people/don.murray/<http://www.esrl.noaa.gov/psd/people/don.murray/>
>
>
> ______________________________**_________________
> idvusers mailing list
> idvusers@xxxxxxxxxxxxxxxx
> For list information, to unsubscribe, visit: http://www.unidata.ucar.edu/*
> *mailing_lists/ <http://www.unidata.ucar.edu/mailing_lists/>
>

• References:
  • [idvusers] IDV Jython, Append to Netcdf?
    • From: Paul Graham
  • Re: [idvusers] IDV Jython, Append to Netcdf?
    • From: Don Murray (NOAA Affiliate)