diff --git a/utils/outerjoinRowToTable.m b/utils/outerjoinRowToTable.m
new file mode 100644
index 0000000..0f08ad7
--- /dev/null
+++ b/utils/outerjoinRowToTable.m
@@ -0,0 +1,49 @@
+function Table = outerjoinRowToTable(Table,TableRowToBeAdded)
+%outerjoinRowToTable Adds one row to a table. Variables that are missing in
+%either the table or the row are added with empty values {' '} for cells
+%and NaN for doubles. Works with tables that contain both cells and
+%doubles.
+%
+% * Strings in the table are not yet supported.
+% * The row that is added needs to be formated as table
+% * Adds only one row at a time%
+%
+%   T = outerjoinRowToTable(TableToAddTo,RowToBeAdded) 
+%
+% tmpTableToBeAdded     = table({tmpCombined(:,1)},{tmpCombined(:,2)},{'660eV, m50, 092022'},{'#288,#289,#290.ibw'}, ...
+%   'VariableNames',["bindingEnergy_eV","spectrum_countsNorm","sample","name"]);
+% SpectrumList          = outerjoinRowToTable(SpectrumList,tmpTableToBeAdded);
+%
+% Thorsten, December 2023
+
+% Original Table has more variables
+if ~all(ismember(Table.Properties.VariableNames,TableRowToBeAdded.Properties.VariableNames))
+    tmpMissingVariable = ~ismember(Table.Properties.VariableNames,TableRowToBeAdded.Properties.VariableNames);
+    tmpVariablesToBeAdded = Table.Properties.VariableNames(tmpMissingVariable);
+    for ii = 1:size(tmpVariablesToBeAdded,2)
+        if matches(class(Table.(tmpVariablesToBeAdded{ii})),'double')
+            tmpContentToBeAdded = NaN(1,size(Table.(tmpVariablesToBeAdded{ii}),2));
+            TableRowToBeAdded = addvars(TableRowToBeAdded,tmpContentToBeAdded,'NewVariableNames',tmpVariablesToBeAdded{ii});
+        elseif matches(class(Table.(tmpVariablesToBeAdded{ii})),'cell')
+            tmpContentToBeAdded = {' '};
+            TableRowToBeAdded = addvars(TableRowToBeAdded,tmpContentToBeAdded,'NewVariableNames',tmpVariablesToBeAdded{ii});
+        end
+    end
+end
+% Table to be added has more variables
+if ~all(ismember(TableRowToBeAdded.Properties.VariableNames,Table.Properties.VariableNames))
+    tmpMissingVariable = ~ismember(TableRowToBeAdded.Properties.VariableNames,Table.Properties.VariableNames);
+    tmpVariablesToBeAdded = TableRowToBeAdded.Properties.VariableNames(tmpMissingVariable);
+    for ii = 1:size(tmpVariablesToBeAdded,2)
+        if matches(class(TableRowToBeAdded.(tmpVariablesToBeAdded{ii})),'double')
+            tmpContentToBeAdded = NaN(size(Table,1),size(TableRowToBeAdded.(tmpVariablesToBeAdded{ii}),2));
+            Table = addvars(Table,tmpContentToBeAdded,'NewVariableNames',tmpVariablesToBeAdded{ii});
+        elseif matches(class(TableRowToBeAdded.(tmpVariablesToBeAdded{ii})),'cell')
+            tmpContentToBeAdded = repmat({' '},size(Table,1),1);
+            Table = addvars(Table,tmpContentToBeAdded,'NewVariableNames',tmpVariablesToBeAdded{ii});
+        end
+    end
+end
+% Add row to table
+Table = [Table;TableRowToBeAdded];
+end
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