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function hdf_fielddata = ReadHDF5FieldData(file)
% function hdf_fielddata = ReadHDF5FieldData(file)
%
% returns:
% % time domain data (if exist)
% hdf_fielddata.TD.time
% hdf_fielddata.TD.names
% hdf_fielddata.TD.values
% hdf_fielddata.TD.DataType (0 --> real value data)
%
% % frequency domain data (if exist)
% hdf_fielddata.FD.frequency
% hdf_fielddata.FD.values
% hdf_fielddata.FD.DataType (0 / 1 --> real / complex value data)
%
% example: values of timestep 12:
% hdf_fielddata.TD.values{12}: array (x,y,z,polarization)
%
% plot z-field component along y-direction for timestep 12:
% plot( hdf_fielddata.TD.values{12}(1,:,1,3) )
%
% openEMS matlab interface
% -----------------------
% author: Thorsten Liebig
%
% See also ReadHDF5Mesh ReadHDF5Dump
if isOctave
hdf_fielddata = ReadHDF5FieldData_octave(file);
return
end
info = hdf5info(file);
TD.names = {};
hdf_fielddata = [];
for n=1:numel(info.GroupHierarchy.Groups)
if strcmp(info.GroupHierarchy.Groups(n).Name,'/FieldData')
%found /FieldData, look for either TD or FD data
for nGroup=1:numel(info.GroupHierarchy.Groups(n).Groups)
%search and read TD data
if strcmp(info.GroupHierarchy.Groups(n).Groups(nGroup).Name,'/FieldData/TD')
for m=1:numel(info.GroupHierarchy.Groups(n).Groups(nGroup).Datasets)
TD.names{m} = info.GroupHierarchy.Groups(n).Groups(nGroup).Datasets(m).Name;
for a = 1:numel(info.GroupHierarchy.Groups(n).Groups(nGroup).Datasets(m).Attributes)
str = regexp(info.GroupHierarchy.Groups(n).Groups(nGroup).Datasets(m).Attributes(a).Name,'\w/*\w*','match');
TD.(str{end})(m) = double(info.GroupHierarchy.Groups(n).Groups(nGroup).Datasets(m).Attributes(a).Value);
end
end
end
end
end
end
if (numel(TD.names)>0)
hdf_fielddata.TD=TD;
hdf_fielddata.TD.DataType = 0; %real value data
for n=1:numel(hdf_fielddata.TD.names)
hdf_fielddata.TD.values{n} = double(hdf5read(file,hdf_fielddata.TD.names{n}));
end
end
% extract FD data
try
hdf_fielddata.FD.frequency = ReadHDF5Attribute(file,'/FieldData/FD','frequency');
catch err
% disp(err)
return
end
for n=1:numel(hdf_fielddata.FD.frequency)
try
hdf_fielddata.FD.values{n} = double(hdf5read(file,['/FieldData/FD/f' int2str(n-1) '_real']) + 1i*hdf5read(file,['/FieldData/FD/f' int2str(n-1) '_imag']));
hdf_fielddata.FD.DataType = 1; %complex value data
catch
try
hdf_fielddata.FD.values{n} = double(hdf5read(file,['/FieldData/FD/f' int2str(n-1)]));
hdf_fielddata.FD.DataType = 0; %real value data
catch
error('openEMS:ReadHDF5FieldData','FD data invalid...')
end
end
end
function hdf_fielddata = ReadHDF5FieldData_octave(file)
hdf = load( '-hdf5', file );
if ~isfield(hdf,'FieldData')
error('no field data found')
end
if isfield(hdf.FieldData,'TD')
%read TD data
hdf_fielddata_names = fieldnames(hdf.FieldData.TD);
for n=1:numel(hdf_fielddata_names)
hdf_fielddata.TD.values{n} = hdf.FieldData.TD.(hdf_fielddata_names{n});
hdf_fielddata.TD.names{n} = ['/FieldData/TD/' hdf_fielddata_names{n}(2:end)];
hdf_fielddata.TD.time(n) = ReadHDF5Attribute(file, hdf_fielddata.TD.names{n},'time');
end
hdf_fielddata.TD.DataType = 0; %real value data
end
if isfield(hdf.FieldData,'FD')
%read FD data
hdf_fielddata.FD.frequency = ReadHDF5Attribute(file,'/FieldData/FD/','frequency');
try %try reading complex data
for n=1:numel(hdf_fielddata.FD.frequency)
hdf_fielddata.FD.values{n} = double(hdf.FieldData.FD.(['f' int2str(n-1) '_real']) +1i*hdf.FieldData.FD.(['f' int2str(n-1) '_imag']) );
end
hdf_fielddata.FD.DataType = 1; %complex value data
catch
try %try reading real value data
for n=1:numel(hdf_fielddata.FD.frequency)
hdf_fielddata.FD.values{n} = double(hdf.FieldData.FD.(['f' int2str(n-1)]));
end
hdf_fielddata.FD.DataType = 0; %real value data
catch
error('openEMS:ReadHDF5FieldData','FD data invalid...')
end
end
end
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