Fix getRow method for dynamic table (#648)

* Permute nd arrays to get correct shape for table

* Update getRow.m

Ensure fix also works if a dynamic table is created raw by raw using the addRow method

* Add test for previous failure point

* Update getRow.m

Update function to also transpose 2D arrays (matrices) which are not vectors

* Add test for toTable method for n-dimensional vectordata

+tests/+unit/dynamicTableTest.m

@@ -74,6 +74,32 @@ function testClearDynamicTableV2_1(testCase)
     rehash();
 end
 
+function testToTableForNdVectorData(testCase)
+    import matlab.unittest.fixtures.SuppressedWarningsFixture
+    testCase.applyFixture(...
+        SuppressedWarningsFixture('NWB:DynamicTable:VectorDataAmbiguousSize'))
+
+    arrayLength = 5;
+    numTableRows = 3;
+    nDimsToTest = [2,3,4];
+
+    for nDims = nDimsToTest
+        vectorDataShape = repmat(arrayLength, 1, nDims-1);
+
+        dynamicTable = types.hdmf_common.DynamicTable( ...
+            'description', 'test table with n-dimensional VectorData', ...
+            'colnames', {'columnA', 'columnB'}, ...
+            'columnA', types.hdmf_common.VectorData('data', randi(10, [vectorDataShape, numTableRows])), ...
+            'columnB', types.hdmf_common.VectorData('data', randi(10, [vectorDataShape, numTableRows])), ...
+            'id', types.hdmf_common.ElementIdentifiers('data', (0:numTableRows-1)'  ) );
+
+        T = dynamicTable.toTable();
+        testCase.verifyClass(T, 'table');
+        testCase.verifySize(T.columnA, [numTableRows, vectorDataShape])
+    end
+end
+
+
 % Non-test functions
 function dtr_table = createDynamicTableWithTableRegionReferences()
     % Create a dynamic table with two columns, where the data of each column is 

+types/+util/+dynamictable/getRow.m

@@ -46,11 +46,12 @@
     row{i} = select(DynamicTable, indexNames, ind);
 
     if ~istable(row{i})
-        % transpose row vectors
-        if isrow(row{i})
-            row{i} = row{i} .';
-        % or permute arrays to place last dimension first
-        elseif ~ismatrix(row{i}) % i.e nd array where n >= 3
+        if iscolumn(row{i})
+            % keep column vectors as is
+        elseif isrow(row{i})
+            row{i} = row{i} .'; % transpose row vectors
+        elseif ndims(row{i}) >= 2 % i.e nd array where ndims >= 2
+            % permute arrays to place last dimension first
             array_size = size(row{i});
             num_rows = numel(ind);