[MITgcm-support] How to join two nc files?

[Baylor Fox-Kemper]

Hi David,
   I like your script so much that I have checked it in to the  
repository.  I hope that's OK with you; please let me know if not.
   Cheers,
     -Baylor

On Jun 7, 2006, at 2:47 PM, David Wang wrote:

> I wrote a simple matlab script based on mnc_assembly.m. It's a  
> quick and dirty way to join multi-tile mnc output.	- d.
>
> Ed Hill wrote:
>> On Tue, 2006-06-06 at 09:44 -0400, Baylor Fox-Kemper wrote:
>>> One can also use ferret to open multiple tiles using ferret.   
>>> Here is
>>> an example.
>> Hi Baylor,
>> Thanks for the matlab and ferret examples.  There are at least four
>> other ways of reading (and potentially "joining") multiple netcdf  
>> files
>> and they are:
>>   MITgcm/utils/matlab/mnc_assembly.m
>>     This is a matlab script that will assemble both exch1 and exch2
>>     domains.  It reads a collection of per-tile MITgcm netcdf output
>>     files and writes a collection of per-face netcdf files.
>>   MITgcm/utils/matlab/rdmnc.m
>>     This is meant to be a "netcdf version of rdmds".  It reads      
>> and spatially assembles multiple MITgcm netcdf output files.
>>   MITgcm/utils/matlab/gmt/rdnctiles.m
>>     This is another "netcdf version of rdmds".  Its newer than      
>> rdmnc and has more flexibility.  It can perform "assembly"
>>     of exch1-style XY arrays, exch2-style cubes, and can also      
>> return matlab structures with per-tile information that     can  
>> handle completely general tile/face topologies.
>>   NCO:  http://nco.sourceforge.net/
>>     NCO is a suite of netcdf tools that can be used to perform      
>> all sorts of helpful pre- and post-processing.  With the NCO
>>     utilities its relatively easy to extract hyper-slabs,
>>     concatenate along various dimensions, etc.
>> Ed
>> NOTE:  All of the above MatLAB scripts rely upon Chuck Denham's
>>        MexCDF (aka "mexcdf53") toolbox.
> function foo = gluemnc(diags,nIter0)
> % gluemnc.m
> % written by david wang, ldeo
> %
> % purpose: use mnc_assembly.m to glue the multi-tile *.*.nc mnc output
> %	   into a single "global" nc file, which is subject to further
> %	   manipulation (e.g., adding/modifying coordiates/attributes)
> %	   if necessary.
> %
> %	   diags:  diagnostics name
> %          nIter0: 10-digit iterate #
> % EXAMPLE:
> %	   foo = gluemnc('state','0000000000');
>
> if nargin ~= 2, error('there have to be two input arguments!'); end
>
> nc_in    = [diags,'.',nIter0,'.t%03d.nc'];
> nc_inone = [diags,'.',nIter0,'.t001.nc'];
> nc_inall = [diags,'.',nIter0,'.t*.nc'];
> nc_out   = [diags,'_',nIter0,'.nc'];
>
> varlist = ncload(nc_inone);
> nvars =   length(varlist);
> vars = struct([]);
>
> for i = 1:nvars,
>   vars(i).name = char(varlist(i));
> end
>
> [nt,nf] = mnc_assembly(nc_in, vars, nc_out);
>
> reply = input('delete the original tiled files? [y/n] ','s');
> if isempty(reply), reply = 'y'; end
> if strcmpi(reply,'y'), delete(nc_inall); end
>
> return
>
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