netcdf.inqAtt - Return information about netCDF attribute

Syntax

Description

[xtype,attlen] = netcdf.inqAtt(ncid,varid,attname) returns the data type, xtype, and length, attlen, of the attribute identified by the text string attname.

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

varid identifies the variable that the attribute is associated with. To get information about a global attribute, specify netcdf.getConstant('NC_GLOBAL') in place of varid.

This function corresponds to the nc_inq_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.

Examples

This example opens the example netCDF file included with MATLAB, example.nc, and gets information about an attribute in the file.

% Open netCDF example file.
ncid = netcdf.open('example.nc','NOWRITE');

% Get identifier of a variable in the file, given its name.
varid = netcdf.inqVarID(ncid,'avagadros_number');

% Get attribute name, given variable id and attribute number.
attname = netcdf.inqAttName(ncid,varid,0);

% Get information about the attribute.
[xtype,attlen] = netcdf.inqAtt(ncid,varid,'description')

xtype =

     2


attlen =

    31

% Get name of global attribute
gattname = netcdf.inqAttName(ncid,netcdf.getConstant('NC_GLOBAL'),0);

% Get information about global attribute.
[gxtype gattlen] = netcdf.inqAtt(ncid,netcdf.getConstant('NC_GLOBAL'),gattname)

gxtype =

     2


gattlen =

    11

See Also

netcdf.inqAttID | netcdf.inqAttName