netcdf.delAtt

Delete netCDF attribute

Syntax

netcdf.delAtt(ncid,varid,attName)


Description

netcdf.delAtt(ncid,varid,attName) deletes the attribute identified by attName. Specify attName as a character vector or string scalar.

ncid is a netCDF file identifier returned by netcdf.create or netcdf.open.

varid is a numeric value that identifies the variable. To delete a global attribute, use netcdf.getConstant('GLOBAL') for the varid. You must be in define mode to delete an attribute.

This function corresponds to the nc_del_att function in the netCDF library C API. To use this function, you should be familiar with the netCDF programming paradigm.

Examples

This example opens a local copy of the example netCDF file included with MATLAB^®, example.nc.

% Open a netCDF file.
ncid = netcdf.open('my_example.nc','NC_WRITE')

% Determine number of global attributes in file.
[numdims numvars numatts unlimdimID] = netcdf.inq(ncid);

numatts =

   1

% Get name of attribute; it is needed for deletion.
attname = netcdf.inqAttName(ncid,netcdf.getConstant('NC_GLOBAL'),0)

% Put file in define mode to delete an attribute.
netcdf.reDef(ncid); 

% Delete the global attribute in the netCDF file.
netcdf.delAtt(ncid,netcdf.getConstant('GLOBAL'),attname);

% Verify that the global attribute was deleted.
[numdims numvars numatts unlimdimID] = netcdf.inq(ncid);

numatts =
   
   0