Add DecompositionSeries example to ecephys tutorial (#623)

* Fix bug in table2nwb

* Add DecompositionSeries to ecephys tutorial

* Merge ecepys tutorial

* Revert changes committed by mistake

* Add band_mean and stdev to bands in DecompositionSeries

* Properly incorporated changes from main

* Suppress output of feature variable + minor fix of TutorialTest

+tests/+unit/TutorialTest.m

@@ -120,7 +120,8 @@ function inspectTutorialFileWithNwbInspector(testCase)
                     results = py.list(py.nwbinspector.inspect_nwbfile(nwbfile_path=nwbFilename));
                     results = testCase.convertNwbInspectorResultsToStruct(results);
                 elseif testCase.NWBInspectorMode == "CLI"
-                    [~, m] = system(sprintf('nwbinspector %s --levels importance', nwbFilename));
+                    [s, m] = system(sprintf('nwbinspector %s --levels importance', nwbFilename));
+                    testCase.assertEqual(s,0, 'Failed to run NWB Inspector using system command.')
                     results = testCase.parseNWBInspectorTextOutput(m);
                 end
 

+util/table2nwb.m

@@ -28,8 +28,8 @@
 
 for col = T
     if ~strcmp(col.Properties.VariableNames{1},'id')
-
-        if ~isempty(col.Properties.VariableDescriptions{1})
+        if ~isempty(col.Properties.VariableDescriptions) ...
+                && ~isempty(col.Properties.VariableDescriptions{1})
             description = col.Properties.VariableDescriptions{1};
         else
             description = 'no description provided';