在 MATLAB 中组合两个结构体的有效方法有哪些? [英] What are some efficient ways to combine two structures in MATLAB?

问题描述

我想结合两个具有不同字段名称的结构.

I want to combine two structures with differing fields names.

例如，开头:

A.field1 = 1;
A.field2 = 'a';

B.field3 = 2;
B.field4 = 'b';

我想要:

C.field1 = 1;
C.field2 = 'a';
C.field3 = 2;
C.field4 = 'b';

有没有比使用字段名"和 for 循环更有效的方法?

Is there a more efficient way than using "fieldnames" and a for loop?

让我们假设在字段名称冲突的情况下，我们优先使用 A.

Let's assume that in the case of field name conflicts we give preference to A.

推荐答案

没有冲突，你可以做到

M = [fieldnames(A)' fieldnames(B)'; struct2cell(A)' struct2cell(B)'];
C=struct(M{:});

这是相当有效的.但是，重复字段名上的 struct 错误，以及使用 unique 预先检查它们会降低性能，以至于循环更好.但这就是它的样子:

And this is reasonably efficient. However, struct errors on duplicate fieldnames, and pre-checking for them using unique kills performance to the point that a loop is better. But here's what it would look like:

M = [fieldnames(A)' fieldnames(B)'; struct2cell(A)' struct2cell(B)'];

[tmp, rows] = unique(M(1,:), 'last');
M=M(:, rows);

C=struct(M{:});

您可以通过假设没有冲突并在对 struct 的调用周围使用 try/catch 来优雅地降级到冲突处理情况来制定混合解决方案.

You might be able to make a hybrid solution by assuming no conflicts and using a try/catch around the call to struct to gracefully degrade to the conflict handling case.

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