MATLAB: Error using hdf5lib2

mopitt terra data

hi.

we tried to open Mopitt (Terra) data on Carbon Monoxide in Matlab using hdf5.

but we get the following

Error usinghdf5lib2

H5G_traverse_real component not found

H5G_traverse internal path traversal failed

H5G_loc_find can't find object

H5Dopen1 not found

Error in H5D.open (line 26)

dataset_id = H5ML.hdf5lib2('H5Dopen', varargin{:});

our FILE_NAME is 'MOPO2R-20200818-L2V18.6.1.he5'

DATAFIELD_NAME is '/HDFEOS/GRIDS/OMI Column Amount O3/Data Fields/ColumnAmountO3

file_id is H5F.open(FILE_NAME, 'H5F_ACC_RDONLY', 'H5P_DEFAULT')

data_id is H5D.open(file_id, DATAFIELD_NAME)

attached is our code.

thank you.

There is no /HDFEOS/GRIDS/OMI Column Amount O3/Data Fields/ColumnAmountO3 in your dataset.

You should use h5info() to examine the dataset,

Create a cell array out of the character array:

c = cellstr(val);

Then, each cell element is a string that can be used:

c{1}

for example, is the first string. (Notice the use of curly brackets there.) You can read more about the use of cell array in the documentation.

This is a frequently asked question and searching in this forum would reveal e.g.:

for k = 1:366
  FILE_NAME = sprintf('MLS-Aura_L2GP-O3_v04-23-c02_2016d%03d.SUB.he5', k);
  ...
end

Don't forget to close the files.