Determine if variable name exists in netcdf file.

I need to check if a variable name exist in a netcdf file. Is there a way to do this without creating a list variable names and searching it entry by entry in a loop?

I think I can catch it with the warnings produced:

   >> a=netcdf.inqVarID(ncid,'u_d')
   Error using netcdflib
   The NetCDF library encountered an error during execution of 'inqVarID'       function - 'Variable not found (NC_ENOTVAR)'.

   Error in netcdf.inqVarID (line 22)
   varid = netcdflib('inqVarID', ncid, varname);

but Im not familiar with warnings.

Answer 1

[Jason]

Not sure if this is the best way but it works and its fast:

file = 'C:\Users\Jason\Documents\MATLAB\sgData\sg135\p1350050.nc';
ncid = netcdf.open(file,'nowrite');
str = 'good';
var = 'u_da';
try
    ID = netcdf.inqVarID(ncid,var);
catch exception
    if strcmp(exception.identifier,'MATLAB:imagesci:netcdf:libraryFailure')
        str = 'bad';
    end
end

netcdf.close(ncid)
disp(str)

Answer 2

[francisco]

Hello Jason

I have the same problem, can you help me on this please.

[Vijay Sagar]

The above solution by @Jason worked for me. I had a different 'exception' for my files. I have repaced with that after that it worked successfuly for me.