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function attr = ReadHDF5Attribute(file, groupname, attr_name)
% attr = ReadHDF5Attribute(file, groupname, attr_name)
%
% internal function for openEMS to read hdf5 attributes
%
% See also: ReadHDF5ComplexData
%
% openEMS Matlab/Octave interface
% -----------------------
% author: Thorsten Liebig, 2012
if isOctave
if (exist('h5readatt_octave')==0)
warning('openEMS:ReadHDF5Attribute','function "h5readatt_octave" not found, trying to run "setup"');
try
setup
catch
error('openEMS:ReadHDF5Attribute','running "setup" failed...');
end
end
attr = double(h5readatt_octave(file,groupname,attr_name));
else
%check for different matlab versions
if verLessThan('matlab','7.9')
attr = double(hdf5read(file,[groupname '/' attr_name]));
elseif verLessThan('matlab','7.12')
attr = double(hdf5read(file,groupname,attr_name));
else
attr = double(h5readatt(file,groupname,attr_name));
end
end
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