matlab oop 重置属性

Question

我尝试从类函数内部从 matlab 类属性向量中删除一个条目。正确的元素会被删除，但旧条目不会被覆盖。

这是我的课：

classdef unknownPoints    
    properties
        points;
    end

    methods
        function removePoint(obj, num)
            points = obj.points(obj.points ~= num)  [1]
        end
    end
end

我是这样称呼的：

up = unknownPoints();
up.points = [up.points 3];
up.points = [up.points 2];
up.points = [up.points 7];
up.removePoint(3);
up.points   [2]

结果是：

points = 2     7        <-- from inside the method    [1]
ans    = 3     2     7  <-- and that how it looks like from outside [2]

我希望从外部读取的内容类似于第一个 => [2, 7] 结果，但似乎 'points' 属性没有被覆盖。 我做错了什么？

Answer 1

classdef unknownPoints < handle   
    properties
        points;
    end

    methods
        function removePoint(obj, num)
            obj.points = obj.points(obj.points ~= num)
        end
    end
end

您创建了一个局部变量points，而不是修改对象变量。