quantity.Discrete.l2norm: revised

+quantity/Discrete.m

@@ -1914,35 +1914,29 @@ classdef  (InferiorClasses = {?quantity.Symbolic}) Discrete ...
 				'name', "log10(" + obj(1).name + ")");
 		end % log10()
 		
-		function xNorm = l2norm(obj, integralGridName, optArg)
-			% calculates the l2 norm, for instance
-			%	xNorm = sqrt(int_0^1 x.' * x dz).
-			% Optionally, a weight can be defined, such that instead
-			%	xNorm = sqrt(int_0^1 x.' * weight * x dz).
-			% The integral domain is specified by integralGrid.
+		function xNorm = l2norm(obj, integrationDomain, optArg)
+			% l2norm calculates the l2 norm
+			%	xNorm = sqrt(int x.' * weight * x ddomain).
+			%
+			%	xNorm = l2norm(x) returns sqrt(int x.' * x ddomain), while the integral is
+			%	performed over every domain
+			%
+			%	xNorm = l2norm(x, integrationDomain) returns sqrt(int x.' * x ddomain), while the 
+			%	integral is performed over every domain specified by the string-array
+			%	integrationDomain. Default value is [obj(1).domain.name]
+			%	
+			%	l2norm(..., "weight", weight) considers the weight according to
+			%	xNorm = sqrt(int x.' * weight * x ddomain). Default falue is the identety matrix.
 			arguments
 				obj;
-				integralGridName {mustBe.gridName} = [obj(1).domain.name];
-				optArg.weight = eye(size(obj, 1));
+				integrationDomain string = [obj(1).domain.name];
+				optArg.weight (:, :) double = eye(size(obj, 1));
 			end
 			
-			integralGridName = misc.ensureString(integralGridName);
-			
-			if obj.nargin == 1 && all(strcmp([obj(1).domain.name], integralGridName))
-				
-				integratedValue = int(obj.' * optArg.weight * obj);
-				
-				if isnumeric(integratedValue)
-					xNorm = sqrtm( integratedValue );
-				else
-					xNorm = sqrtm(on(integratedValue, integralGridName));
-				end
-			else
-				xNorm = sqrtm( int(obj.' * optArg.weight * obj, integralGridName) );
+			xNorm = sqrtm( int(obj.' * optArg.weight * obj, integrationDomain) );
 			if isa(xNorm, 'quantity.Discrete')
 				xNorm = xNorm.setName("||" + obj(1).name + "||_{L2}");
 			end
-			end
 		end % l2norm()
 		
 		function xNorm = norm(obj, p)