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+io/+HDF/hdf5_append_attr.m

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+%HDF5_APPEND_ATTR Append an attribute to a dataset
+%
+% file...       HDF filename
+% attr...       structure of attributes
+% loc...        location of the dataset that needs to be removed
+% 
+%
+
+%*-----------------------------------------------------------------------*
+%|                                                                       |
+%|  Except where otherwise noted, this work is licensed under a          |
+%|  Creative Commons Attribution-NonCommercial-ShareAlike 4.0            |
+%|  International (CC BY-NC-SA 4.0) license.                             |
+%|                                                                       |
+%|  Copyright (c) 2017 by Paul Scherrer Institute (http://www.psi.ch)    |
+%|                                                                       |
+%|       Author: CXS group, PSI                                          |
+%*-----------------------------------------------------------------------*
+% You may use this code with the following provisions:
+%
+% If the code is fully or partially redistributed, or rewritten in another
+%   computing language this notice should be included in the redistribution.
+%
+% If this code, or subfunctions or parts of it, is used for research in a 
+%   publication or if it is fully or partially rewritten for another 
+%   computing language the authors and institution should be acknowledged 
+%   in written form in the publication: “Data processing was carried out 
+%   using the “cSAXS matlab package” developed by the CXS group,
+%   Paul Scherrer Institut, Switzerland.” 
+%   Variations on the latter text can be incorporated upon discussion with 
+%   the CXS group if needed to more specifically reflect the use of the package 
+%   for the published work.
+%
+% A publication that focuses on describing features, or parameters, that
+%    are already existing in the code should be first discussed with the
+%    authors.
+%   
+% This code and subroutines are part of a continuous development, they 
+%    are provided “as they are” without guarantees or liability on part
+%    of PSI or the authors. It is the user responsibility to ensure its 
+%    proper use and the correctness of the results.
+
+function hdf5_append_attr( file, attr, loc)
+import io.HDF.*
+plist = 'H5P_DEFAULT';
+
+fileID = H5F.open(file,'H5F_ACC_RDWR',plist);
+
+gpath = strsplit(rm_delimiter(loc), '/');
+
+gpath_depth = length(gpath);
+gid{1} = fileID;
+for ii=1:gpath_depth
+    try
+        gid{end+1} = H5G.open(gid{ii}, gpath{ii}, plist);
+    catch
+        gid{end+1} = H5D.open(gid{ii}, gpath{ii});
+    end
+end
+
+fn = fieldnames(attr);
+for ii=1:length(fn)
+    write_attribute(gid{end}, attr.(fn{ii}), fn{ii}, true);
+end
+    
+H5F.close(fileID);
+
+
+end