diff --git a/matStats/@Table/mean.m b/matStats/@Table/mean.m
index b8b2b9a..9801393 100644
--- a/matStats/@Table/mean.m
+++ b/matStats/@Table/mean.m
@@ -18,12 +18,12 @@
 %         mean         5.8433         3.054         3.7587        1.1987
 %
 %   See also
-%     median, std, var
+%     median, std, var, sum
 %
 
 % ------
 % Author: David Legland
-% e-mail: david.legland@inra.fr
+% e-mail: david.legland@inrae.fr
 % Created: 2011-06-17,    using Matlab 7.9.0.529 (R2009b)
 % Copyright 2011 INRA - Cepia Software Platform.
 
@@ -32,9 +32,15 @@
     error('Can not compute mean for table with factors');
 end
 
+% parse dimension to process
 dim = 1;
 if ~isempty(varargin)
-    dim = varargin{1};
+    var1 = varargin{1};
+    if isnumeric(var1) && isscalar(var1)
+       dim = var1;
+    else
+        error('Can not interpret optional argument');
+    end
 end
 
 newName = '';
diff --git a/matStats/@Table/median.m b/matStats/@Table/median.m
index 8112370..3ff9091 100644
--- a/matStats/@Table/median.m
+++ b/matStats/@Table/median.m
@@ -5,6 +5,9 @@
 %   Computes the median of each column in the table, and put the result in
 %   a new table.
 %
+%   RES = median(TAB, DIM)
+%   Specifies the dimension for computing sum. Default is 1.
+%
 %   Example
 %     iris = Table.read('fisherIris.txt');
 %     median(iris(:,1:4))
@@ -13,7 +16,7 @@
 %         median            5.8             3           4.35           1.3
 %
 %   See also
-%     mean, std
+%     mean, std, sum
 %
 
 % ------
@@ -28,14 +31,32 @@
     error('Can not compute median for table with factors');
 end
 
+% parse dimension to process
+dim = 1;
+if ~isempty(varargin)
+    var1 = varargin{1};
+    if isnumeric(var1) && isscalar(var1)
+       dim = var1;
+    else
+        error('Can not interpret optional argument');
+    end
+end
 
 newName = '';
 if ~isempty(obj.Name)
     newName = ['Median of ' obj.Name];
 end
 
-res = Table.create(median(obj.Data, 1), ...
-    'rowNames', {'median'}, ...
-    'colNames', obj.ColNames, ...
-    'name', newName);
-    
\ No newline at end of file
+if dim == 1
+    res = Table.create(median(obj.Data, 1), ...
+        'Parent', obj, ...
+        'RowNames', {'median'}, ...
+        'Name', newName);
+    
+else
+    res = Table.create(median(obj.Data, 2), ...
+        'Parent', obj, ...
+        'ColNames', {'median'}, ...
+        'Name', newName);
+    
+end   
\ No newline at end of file
diff --git a/matStats/@Table/sum.m b/matStats/@Table/sum.m
index 7dd0add..59ec847 100644
--- a/matStats/@Table/sum.m
+++ b/matStats/@Table/sum.m
@@ -2,6 +2,10 @@
 % Put the sum of each column in a new table.
 %
 %   RES = sum(TAB)
+%   Computes the sum of each column in the table.
+%
+%   RES = sum(TAB, DIM)
+%   Specifies the dimension for computing sum. Default is 1.
 %
 %   Example
 %     tab = Table.read('fisherIris.txt');
@@ -12,12 +16,12 @@
 % 
 %
 %   See also
-%     mean, plus
+%     mean, sum
 %
 
 % ------
 % Author: David Legland
-% e-mail: david.legland@inra.fr
+% e-mail: david.legland@inrae.fr
 % Created: 2011-06-17,    using Matlab 7.9.0.529 (R2009b)
 % Copyright 2011 INRA - Cepia Software Platform.
 
@@ -33,9 +37,26 @@
     newName = ['Sum of ' obj.Name];
 end
 
+% parse direction
+dim = 1;
+if ~isempty(varargin)
+    var1 = varargin{1};
+    if isnumeric(var1) && isscalar(var1)
+       dim = var1;
+    else
+        error('Can not interpret optional argument');
+    end
+end
+
 % create result table
-res = Table.create(sum(obj.Data, 1), ...
-    'rowNames', {'sum'}, ...
-    'colNames', obj.ColNames, ...
-    'name', newName);
-    
\ No newline at end of file
+if dim == 1
+    res = Table.create(sum(obj.Data, 1), ...
+        'RowNames', {'sum'}, ...
+        'ColNames', obj.ColNames, ...
+        'Name', newName);
+elseif dim == 2
+    res = Table.create(sum(obj.Data, 2), ...
+        'RowNames', obj.RowNames, ...
+        'ColNames', {'sum'}, ...
+        'Name', newName);
+end
\ No newline at end of file
diff --git a/tests/test_mean.m b/tests/test_mean.m
index e144860..af34200 100644
--- a/tests/test_mean.m
+++ b/tests/test_mean.m
@@ -27,3 +27,15 @@ function test_Simple(testCase) %#ok<*DEFNU>
 
 assertTrue(testCase, isa(res, 'Table'));
 assertEqual(testCase, res.Data, mean(data), 'AbsTol', .01);
+
+
+function test_Dim2(testCase) %#ok<*DEFNU>
+% Test call of function without argument.
+
+data = ones([6 4]);
+tab = Table(data);
+
+res = mean(tab, 2);
+
+assertTrue(testCase, isa(res, 'Table'));
+assertEqual(testCase, size(res), [6 1]);
diff --git a/tests/test_median.m b/tests/test_median.m
index a7a74df..ee5336b 100644
--- a/tests/test_median.m
+++ b/tests/test_median.m
@@ -27,3 +27,15 @@ function test_Simple(testCase) %#ok<*DEFNU>
 
 assertTrue(testCase, isa(res, 'Table'));
 assertEqual(testCase, res.Data, median(data), 'AbsTol', .01);
+
+
+function test_Dim2(testCase) %#ok<*DEFNU>
+% Test call of function without argument.
+
+data = ones([6 4]);
+tab = Table(data);
+
+res = median(tab, 2);
+
+assertTrue(testCase, isa(res, 'Table'));
+assertEqual(testCase, size(res), [6 1]);
diff --git a/tests/test_sum.m b/tests/test_sum.m
index 4c2d8a2..9aa4bee 100644
--- a/tests/test_sum.m
+++ b/tests/test_sum.m
@@ -27,3 +27,15 @@ function test_Simple(testCase) %#ok<*DEFNU>
 
 assertTrue(testCase, isa(res, 'Table'));
 assertEqual(testCase, res.Data, sum(data), 'AbsTol', .01);
+
+
+function test_Dim2(testCase) %#ok<*DEFNU>
+% Test call of function without argument.
+
+data = ones([6 4]);
+tab = Table(data);
+
+res = sum(tab, 2);
+
+assertTrue(testCase, isa(res, 'Table'));
+assertEqual(testCase, size(res), [6 1]);