Matlab:求和结构 [英] Matlab: Sum structures

问题描述

我正在寻找一种求和结构的简单方法
具有相同的子结构层次结构.

I'm looking for a very simple method to sum structures
which have identical substructure hierarchies.

注意:这始于尝试假设我有2个结构red和blue.
每个结构都有子字段a，b和c.
每个子字段都有子字段x1和x2.

Assume I have 2 structures red and blue.
Each structure has subfields a, b, and c.
Each subfield has subfields x1 and x2.

这画在下面:

red. [a, b, c].[x1, x2]
blue.[a, b, c].[x1, x2]

是否存在这样的函数，使得数学运算符
可以应用于red和blue的每个并行元素吗?

Does a function exist such that a mathematical operator
may be applied to each parallel element of red and blue?

类似的东西:

purple = arrayfun( @(x,y) x+y, red, blue)

推荐答案

意识到实现支持任意结构并支持代码生成的动态代码是不可能的(afaik)，简化编码的最佳可能性是生成代码的函数:

Realizing that dynamic code which does support arbitrary structs and supports code generation is impossible (afaik), the best possibility to simplify coding is a function which generates the code:

function f=structm2(s)
    e=structm3(s);
    f=strcat('y.',e,'=plus(u.',e,',v.',e,');');
    f=sprintf('%s\n',f{:});
end

function e=structm3(s)
e={};
for f=fieldnames(s).'
    f=f{1};
    if isstruct(s.(f))
        e=[e,strcat([f,'.'],structm3(s.(f)))];
    else
        e{end+1}=f;
    end

end
end

您调用structm2输入一个结构，它返回代码:

You call structm2 inputting a struct and it returns the code:

y.a.x1=plus(u.a.x1,v.a.x1);
y.a.x2=plus(u.a.x2,v.a.x2);
y.b.x1=plus(u.b.x1,v.b.x1);
y.b.x2=plus(u.b.x2,v.b.x2);

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