枚举数组中缺少值

对于其他数据类型,我们可以使用NaN或missing。使用此示例枚举类:

classdef MyEnum
   enumeration
      A
      B
   end
end

我试过:

>> [ MyEnum.A MyEnum.B missing ]
Error using horzcat
The following error occurred converting from missing to MyEnum:
Unsupported conversion from 'missing' to enumeration 'MyEnum'.

>> [ MyEnum.A MyEnum.B NaN ]
Error using horzcat
The following error occurred converting from double to MyEnum:
Cannot call the constructor of 'MyEnum' outside of its enumeration block.

我好像错过了一些基本的东西。。。请帮帮我!