0

我正在研究一个在不同模式下配置的 simulink 模型，这些模式会根据所选采样率滤波器组延迟等内容更改模型参数...

我虽然在 a 上设置所有参数ParameterStruct，然后为每种模式加载正确的参数结构。

这种类型很好地映射到具有 Dependent 属性的类，因为只有几个输入生成了很多模型参数。

但是，当我尝试从不尊重可见性生成一个struct时：class

classdef SquareArea
   properties
      Width
      Height
   end
   properties (Access =private)
      Hidden
   end
   properties (Dependent)
      Area
   end
   methods
      function a = get.Area(obj)
         a = obj.Width * obj.Height;
      end
   end
end

>> x=SquareArea

x = 

  SquareArea with properties:

     Width: []
    Height: []
      Area: []

>> struct(x)
Warning: Calling STRUCT on an object prevents the object 
from hiding its implementation details and should thus
be avoided. Use DISP or DISPLAY to see the visible public
details of an object. See 'help struct' for more information.

ans = 

     Width: []
    Height: []
    Hidden: []
      Area: []

这是不可接受的，因为之后我需要将结构导出到 C，以便能够从生成的代码中动态设置模式。

4

3 回答 3

1

您可以覆盖类的默认值struct：

classdef SquareArea
   properties
      Width = 0
      Height = 0
   end
   properties (Access=private)
      Hidden
   end
   properties (Dependent)
      Area
   end
   methods
      function a = get.Area(obj)
         a = obj.Width * obj.Height;
      end
      function s = struct(obj)
          s = struct('Width',obj.Width, 'Height',obj.Height, 'Area',obj.Area);
      end
   end
end

现在：

>> obj = SquareArea
obj = 
  SquareArea with properties:

     Width: 0
    Height: 0
      Area: 0
>> struct(obj)
ans = 
     Width: 0
    Height: 0
      Area: 0

请注意，您仍然可以通过显式调用内置行为来获得原始行为：

>> builtin('struct', obj)
Warning: Calling STRUCT on an object prevents the object from hiding its implementation details and should
thus be avoided. Use DISP or DISPLAY to see the visible public details of an object. See 'help struct' for
more information. 
ans = 
     Width: 0
    Height: 0
    Hidden: []
      Area: 0
于 2016-04-09T18:04:40.133 回答
1 
publicProperties = properties(x);
myStruct = struct();
for iField = 1:numel(publicProperties), myStruct.(publicProperties{iField}) = []; end
于 2016-04-09T18:01:20.363 回答
1

结合来自 Amro 和 DVarga 的答案，可以概括默认结构函数：

     function s = struct(self)
        publicProperties = properties(self);
        s = struct();
        for fi = 1:numel(publicProperties)
            s.(publicProperties{fi}) = self.(publicProperties{fi}); 
        end                  
    end
于 2018-02-26T22:18:05.327 回答