Open attribute specified by index
attr_id = H5A.open_by_idx(loc_id,obj_name,idx_type,order,n)
attr_id = H5A.open_by_idx(loc_id,obj_name,idx_type,order,n,aapl_id,lapl_id)
attr_id = H5A.open_by_idx(loc_id,obj_name,idx_type,order,n) opens
an existing attribute at index n attached to an
object specified by its location, loc_id, and name, obj_name.
idx_type is the type of index and valid values
include the following.
'H5_INDEX_NAME' | An alpha-numeric index by attribute name |
'H5_INDEX_CRT_ORDER' | An index by creation order |
order specifies the index traversal order.
Valid values include the following.
'H5_ITER_INC' | Iteration from beginning to end |
'H5_ITER_DEC' | Iteration from end to beginning |
'H5_ITER_NATIVE' | Iteration in the fastest available order |
attr_id = H5A.open_by_idx(loc_id,obj_name,idx_type,order,n,aapl_id,lapl_id) opens
an attribute with attribute access property list, aapl_id,
and link access property list, lapl_id. The aapl_id argument
must currently be specified as 'H5P_DEFAULT'.
Also, lapl_id can be specified by 'H5P_DEFAULT'.
Loop through a set of dataset attributes in reverse alphabetical order.
fid = H5F.open('example.h5'); gid = H5G.open(fid,'/g1/g1.1'); dset_id = H5D.open(fid,'/g1/g1.1/dset1.1.1'); info = H5O.get_info(dset_id); for idx = 0:info.num_attrs-1 attr_id =H5A.open_by_idx(gid,'dset1.1.1','H5_INDEX_NAME','H5_ITER_DEC',idx); fprintf('attribute name: %s\n',H5A.get_name(attr_id)); H5A.close(attr_id); end H5G.close(gid); H5F.close(fid);