quantity.Discrete.plot: added xlim and ylim

+quantity/Discrete.m

@@ -1189,11 +1189,14 @@ classdef  (InferiorClasses = {?quantity.Symbolic}) Discrete ...
 								obj(rowIdx, columnIdx, figureIdx).domain(1).grid(:), ...
 								obj(rowIdx, columnIdx, figureIdx).valueDiscrete, ...
 								additionalPlotOptions{:});
+							xlim(obj(rowIdx, columnIdx, figureIdx).domain(1).grid([1, end]));
 						elseif obj.nargin() == 2
 							misc.isurf(obj(rowIdx, columnIdx, figureIdx).domain(1).grid(:), ...
 								obj(rowIdx, columnIdx, figureIdx).domain(2).grid(:), ...
 								obj(rowIdx, columnIdx, figureIdx).valueDiscrete, ...
 								additionalPlotOptions{:});
+							xlim(obj(rowIdx, columnIdx, figureIdx).domain(1).grid([1, end]));
+							ylim(obj(rowIdx, columnIdx, figureIdx).domain(2).grid([1, end]));
 							ylabel(labelHelper(2), 'Interpreter','latex');
 						else
 							error('number inputs not supported');