将任意嵌套的整数数组的结构展平为整数的平坦数组 [英] flatten a struct of arbitrarily nested arrays of integers into a flat array of integers

问题描述

在Matlab中是否可以将任意嵌套的整数数组展平为平坦的整数数组?例如

Is it possible to flatten an array of arbitrarily nested arrays of integers into a flat array of integers in Matlab? For example,

[[1,2,[3]],4] -> [1,2,3,4]

任何一种指导都将有所帮助.谢谢. 例如，

Any kind of guidance will be helpful. Thanks. For example,

a.c = [5,4];
a.b.a=[9];
a.b.d=[1,2];

a= b: [1x1 struct]
   c: [5 4]

在这种情况下，我的输出将是

In this case, my output will be

output= [9,1,2,5,4]

推荐答案

我认为您必须适应

I think you will have to adapt the flatten function from the file exchange to use struct2cell so something like this:

function C = flatten_struct(A)

    A = struct2cell(A);
    C = [];
    for i=1:numel(A)  
        if(isstruct(A{i}))
            C = [C,flatten_struct(A{i})];
        else
            C = [C,A{i}]; 
        end
    end

end

结果是:

a.c = [5,4];
a.b.a=[9];
a.b.d=[1,2];

flatten_struct(a)

ans =

    5    4    9    1    2

因此，该顺序与您声明结构的顺序相同，而不是我认为是字母顺序的示例顺序.但是您对此有控制权，所以这应该不是问题.

So the order is in the order you declared your struct instead of in your example order which I presume is alphabetical. But you have control over this so it shouldn't be a problem.

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