Some minor bug fixes and backward compatibility.

src/ypea/ypea_algorithm.m

@@ -277,7 +277,7 @@ function on_iteration_end(this, event_handler)
                     hh = plot(this.nfe_history, this.best_obj_value_history, varargin{:});
 
                 otherwise
-                    error("MODE must be 'iteration' or 'nfe'.");
+                    error('MODE must be ''iteration'' or ''nfe''.');
 
             end
 

src/ypea/ypea_ga.m

@@ -90,7 +90,7 @@
                     value = 'roulettewheel';
 
                 otherwise
-                    error("Invalid selection method. Must be 'random' or 'roulettewheel'.");
+                    error('Invalid selection method. Must be ''random'' or ''roulettewheel''.');
             end
             this.selection = value;
         end

src/ypea/ypea_get_defined_var_types.m

@@ -13,7 +13,7 @@
 function funcs = get_var_definition_funcs()
 
     p = ypea_path();
-    items = dir([p '\ypea_define_var_type_*.m']);
+    items = dir(fullfile(p, 'ypea_define_var_type_*.m'));
 
     funcs = cell(size(items));
 

src/ypea/ypea_simplify_string.m

@@ -1,6 +1,9 @@
 function str = ypea_simplify_string(str)
     % Simplifies a String
     str = lower(str);
-    str = replace(str, [" ", "-", "_", "."], '');
+    str = strrep(str, ' ', '');
+    str = strrep(str, '-', '');
+    str = strrep(str, '_', '');
+    str = strrep(str, '.', '');
 
 end