[netcdfgroup] Converting record dimension to non-record dimension

[Dave Allured]

Joe,

Here is another method if NCO doesn't get it done.  This is a trick 
to remove the "unlimited" characteristic on a named dimension.  This 
method is relatively slow, but it has the advantage of simplicity 
and nothing new to install.  This is in the general class of:

   ncdump in.nc | user hack | ncgen -o out.nc

Here is a specific example to remove unlimited.  Change the dim name 
and integer value to match your file.  C shell syntax:

   set str1 = 'time = UNLIMITED ; // (24350 currently)'
   set str2 = 'time = 24350 ;'
   ncdump in.nc | sed -e "s#^.$str1# $str2#" | ncgen -o out.nc

By the way, the whole file must *always* be rewritten at least once 
when changing "unlimited".  Due to the internal structure of Netcdf 
3 files, it is impossible to switch the unlimited characteristic on 
or off in place.

Dave Allured
CU/CIRES Climate Diagnostics Center (CDC)
NOAA/ESRL/PSD, Climate Analysis Branch (CAB)

Joe Sirott wrote:
> Does anyone know of a utility that will convert a large netCDF file that 
> has a record dimension to a file that contains no record dimension at all?
> 
> --Joe
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