--- a/+scheme/Utux2d.m	Fri Mar 29 14:50:50 2019 -0700
+++ b/+scheme/Utux2d.m	Wed Apr 10 11:00:27 2019 -0700
@@ -12,6 +12,7 @@
         H % Discrete norm
         H_x, H_y % Norms in the x and y directions
         Hi, Hx, Hy, Hxi, Hyi % Kroneckered norms
+        H_w, H_e, H_s, H_n % Boundary quadratures
 
         % Derivatives
         Dx, Dy
@@ -59,6 +60,10 @@
             Hxi = ops_x.HI;
             Hyi = ops_y.HI;
 
+            obj.H_w = Hy;
+            obj.H_e = Hy;
+            obj.H_s = Hx;
+            obj.H_n = Hx;
             obj.H_x = Hx;
             obj.H_y = Hy;
             obj.H = kron(Hx,Hy);
@@ -272,34 +277,14 @@
 
          end
 
-         % Returns the boundary operator op for the boundary specified by the string boundary.
-        % op        -- string or a cell array of strings
+        % Returns the boundary operator op for the boundary specified by the string boundary.
+        % op        -- string
         % boundary  -- string
-        function varargout = getBoundaryOperator(obj, op, boundary)
-
-            if ~iscell(op)
-                op = {op};
-            end
+        function o = getBoundaryOperator(obj, op, boundary)
+            assertIsMember(op, {'e'})
+            assertIsMember(boundary, {'w', 'e', 's', 'n'})
 
-            for i = 1:numel(op)
-                switch op{i}
-                case 'e'
-                    switch boundary
-                    case 'w'
-                        e = obj.e_w;
-                    case 'e'
-                        e = obj.e_e;
-                    case 's'
-                        e = obj.e_s;
-                    case 'n'
-                        e = obj.e_n;
-                    otherwise
-                        error('No such boundary: boundary = %s',boundary);
-                    end
-                    varargout{i} = e;
-                end
-            end
-
+            o = obj.([op, '_', boundary]);
         end
 
         % Returns square boundary quadrature matrix, of dimension
@@ -307,19 +292,9 @@
         %
         % boundary -- string
         function H_b = getBoundaryQuadrature(obj, boundary)
+            assertIsMember(boundary, {'w', 'e', 's', 'n'})
 
-            switch boundary
-                case 'w'
-                    H_b = obj.H_y;
-                case 'e'
-                    H_b = obj.H_y;
-                case 's'
-                    H_b = obj.H_x;
-                case 'n'
-                    H_b = obj.H_x;
-                otherwise
-                    error('No such boundary: boundary = %s',boundary);
-            end
+            H_b = obj.(['H_', boundary]);
         end
 
         function N = size(obj)
@@ -327,14 +302,4 @@
         end
 
     end
-
-    methods(Static)
-        % Calculates the matrices needed for the inteface coupling between boundary bound_u of scheme schm_u
-        % and bound_v of scheme schm_v.
-        %   [uu, uv, vv, vu] = inteface_coupling(A,'r',B,'l')
-        function [uu, uv, vv, vu] = interface_coupling(schm_u,bound_u,schm_v,bound_v)
-            [uu,uv] = schm_u.interface(bound_u,schm_v,bound_v);
-            [vv,vu] = schm_v.interface(bound_v,schm_u,bound_u);
-        end
-    end
-end
\ No newline at end of file
+end