Re: cite the dimetion with special characters

I give up modifying the existing netCDF file, and use ncl to create a new file to sove the problem.
And I tried your method, it also works well too.
thank you very much.

Feng

>Hi Feng,
>NCL cannot reduce the variable length in an existing netCDF file by
>specifying the "w" option in addfile. You can either use NCL to create a
>new netCDF file, or use the netCDF operators (using the ncks utility) to
>reduce variables in the file.
>
>See: http://nco.sourceforge.net/nco.html#ncks-netCDF-Kitchen-Sink
>Hope that helps..
>Adam
>
>On 11/13/2013 11:31 AM, ChenFeng wrote:
>>> [1] Not sure why you are using named dimensions when reading
>>> in the variable. Howecer, the following may work
>>>
>>>
>>>
>>> landusef =
>>> fin->LANDUSEF(Time|:,$"z-dimensions0024"$|:,south_north|:,west_east|:)
>>>
>> Because I want to write the LANDUSEF to a nc file, so I would like use the dimension name.
>> And it works well when i follow you method. thanks.
>>
>>> [2] If you want to decimate the array, try
>>>
>>> landusef = fin->LANDUSEF(:,:,:,::2)
>>> printVarSummary( landusef )
>>>
>>> Please read the Mini-Language Manual at:
>>> http://www.ncl.ucar.edu/Document/Manuals/
>>>
>> I know we can use "delete(landusef)" to decimate the variable,or use :: to reduce the lenth,
>> but what i want to do is to change the data lenth in a nc file. I tried to modify the variable
>> in the file by "fnc->landusef=landusef(:,0:50)", it tells me the dimetion is not equal between
>> the left side and the right side.
>>
>>> On 11/13/13 10:24 AM, ChenFeng wrote:
>>>> Hi,
>>>>
>>>>
>>>> 1.Is there anybody knows how to cite the dimetion with special characters.
>>>> I have an WRF out file, in which there is an variable named LANDUSEF(Time,z-dimensions0024,south_north,west_east).
>>>> When I want to read in the variable by "landusef = fin->LANDUSEF(Time|:,z-dimensions0024|:,south_north|:,west_east|:)",
>>>> it reports error. And if i use "landusef = fin->LANDUSEF", it goes ok.
>>>> 2.the other question is whether ncl can reduce the variable lenth in the nc file.
>>>> for example, there is a variable landusef in nc file, which is a 100x100 data. i want to change it to 100x50, and
>>>> write back into the file.
>>>>
>>>> Thanks.
>>>>
>>>> Feng
>>>>
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>--
>______________________________________________________________
>Adam Phillips asphilli@ucar.edu
>NCAR/Climate and Global Dynamics Division (303) 497-1726
>P.O. Box 3000
>Boulder, CO 80307-3000 http://www.cgd.ucar.edu/cas/asphilli
>
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Received on Wed Nov 13 13:20:14 2013