Octave/MATLAB:如何比较结构是否相等? [英] Octave/MATLAB: How to compare structs for equality?

问题描述

如何比较两个结构在八度音阶(或matlab)中的相等性?

How do I compare two structs for equality in octave (or matlab)?

尝试使用==运算符会产生以下结果:

Attempting to use the == operator yields:

binary operator `==' not implemented for `scalar struct' by `scalar struct' operations

推荐答案

使用isequal或isequalwithequalnans函数.示例代码:

Use either the isequal or isequalwithequalnans function. Example code:

s1.field1 = [1 2 3];
s1.field2 = {2,3,4,{5,6}};
s2 = s1;
isequal(s1,s2)  %Returns true (structures match)

s1.field3 = [1 2 nan];
s2.field3 = [1 2 nan];
isequal(s1, s2)              %Returns false (NaN ~= NaN)
isequalwithequalnans(s1, s2) %Returns true  (NaN == NaN)

s2.field2{end+1}=7;
isequal(s1,s2)               %Returns false (different structures)

isequal(s1, 'Some string')   %Returns false (different classes)

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