Copy attribute to new location
netcdf.copyAtt(ncid_in,varid_in,attname,ncid_out,varid_out) copies an attribute from one variable to another, possibly across files. ncid_in and ncid_out are netCDF file identifiers returned by netcdf.create or netcdf.open. varid_in identifies the variable with an attribute that you want to copy. varid_out identifies the variable to which you want to associate a copy of the attribute.
This function corresponds to the nc_copy_att function in the netCDF library C API. To use this function, you should be familiar with the netCDF programming paradigm. See netcdf for more information.
This example makes a copy of the attribute associated with the first variable in the netCDF example file, example.nc, in a new file. To run this example, you must have write permission in your current directory.
% Open example file. ncid = netcdf.open('example.nc','NC_NOWRITE'); % Get identifier for a variable in the file. varid = netcdf.inqVarID(ncid,'avagadros_number'); % Create new netCDF file. ncid2 = netcdf.create('foo.nc','NC_NOCLOBBER'); % Define a dimension in the new file. dimid2 = netcdf.defDim(ncid2,'x',50); % Define a variable in the new file. varid2 = netcdf.defVar(ncid2,'myvar','double',dimid2); % Copy the attribute named 'description' into the new file, % associating the attribute with the new variable. netcdf.copyAtt(ncid,varid,'description',ncid2,varid2); % % Check the name of the attribute in new file. attname = netcdf.inqAttName(ncid2,varid2,0) attname = description