如何在MATLAB中创建枚举类型？ [英] How do I create enumerated types in MATLAB?

问题描述

在MATLAB中有枚举类型吗？

解决方案

您可以使用新的MATLAB类获取一些功能：

  classdef（Sealed）颜色
属性（常量）
 RED = 1; 
 GREEN = 2; 
 BLUE = 3; 
 end 
 
方法（Access = private）％private，以便您无法实例化
函数out = Colors 
 end 
 end 
 end 
  

这不是一个类型，但由于MATLAB是松散类型的，如果使用整数，可以做一些近似的事情：

  line1 = Colors.RED; 
 ... 
如果Colors.BLUE == line1 
 end 
  

在这种情况下，MATLAB枚举接近C风格的枚举 - 用于整数的替代语法。

仔细使用静态方法，甚至可以MATLAB枚举方法Ada的复杂性，但不幸的是使用笨拙的语法。

Are there enumerated types in MATLAB? If not, what are the alternatives?

解决方案

You can get some of the functionality with new-style MATLAB classes:

classdef (Sealed) Colors
    properties (Constant)
        RED = 1;
        GREEN = 2;
        BLUE = 3;
    end

    methods (Access = private)    % private so that you cant instantiate
        function out = Colors
        end
    end
end

This isn't really a type, but since MATLAB is loosely typed, if you use integers, you can do things that approximate it:

line1 = Colors.RED;
...
if Colors.BLUE == line1
end

In this case, MATLAB "enums" are close to C-style enums - substitute syntax for integers.

With the careful use of static methods, you can even make MATLAB enums approach Ada's in sophistication, but unfortunately with clumsier syntax.

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