Matlab HDF5: Read DIMENSION_LIST attribute -

i'm trying read hdf5 files matlab. created files in fortran, relevant in used h5dsattach_scale_f attached scale datasets each dimension of given primary dataset. of logic works well, i'm having trouble reading attributes of primary dataset in order @ attached scales.

i start iterating through each dataset in file. once know have primary dataset, iterate through attributes call:

[status, index_out, sd] = h5a.iterate(dset_id, 'h5_index_name', 'h5_iter_native', 0, @hdf5_sds_attr_iter, sd);

that calls function every attribute:

function [status, sd] = hdf5_sds_attr_iter(dset_id, attr_name, info, sd)     status = 0;     disp(attr_name);      if ~strcmp(attr_name, 'dimension_list')         return;     end     attr_id = h5a.open(dset_id, attr_name, 'h5p_default');      space = h5a.get_space (attr_id);     [~, dims, ~] = h5s.get_simple_extent_dims(space);      info2 = h5a.get_info(attr_id);     disp(info2);     rdata = h5a.read(attr_id, 'h5ml_default');     disp(rdata);     = 1:dims         disp(rdata{i});     end     h5s.close(space);     h5a.close(attr_id); end 

this output:

dimension_list      3      corder_valid: 1           corder: 0             cset: 0        data_size: 48      [8x1 uint8]     [8x1 uint8]     [8x1 uint8]    184    17     0     0     0     0     0     0     32    28     0     0     0     0     0     0    240    29     0     0     0     0     0     0 

if h5dump on dataset, attribute looks like:

  attribute "dimension_list" {      datatype  h5t_vlen { h5t_reference { h5t_std_ref_object }}      dataspace  simple { ( 3 ) / ( 3 ) }      data {      (0): (dataset 1400 /beamdata scale rank 1 ),      (1): (dataset 6512 /beamdata scale rank 2 ),      (2): (dataset 6976 /beamdata scale rank 3 )      }   } 

since numbers (1400, 6512, 6976) not appear elsewhere in dump, don't know how use them or output of h5a.read (rdata) @ scale data. matlab hdf5 documentation rather silent on attribute data. know how process attribute reference data correctly?