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

问题描述

MATLAB 中有枚举类型吗?如果没有，有哪些替代方案?

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

推荐答案

您可以通过新型 MATLAB 类获得一些功能:

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

这不是一个真正的类型，但由于 MATLAB 是松散类型的，如果你使用整数，你可以做一些近似它的事情:

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

在这种情况下，MATLAB 的枚举"接近于 C 风格的枚举——用整数代替语法.

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

通过谨慎使用静态方法，您甚至可以使 MATLAB 枚举在复杂性上接近 Ada，但不幸的是语法更笨拙.

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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