how can I create a new structure based on a existing one?

Question

Skirt Zhang 2013-2-8

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https://ww2.mathworks.cn/matlabcentral/answers/62698-how-can-i-create-a-new-structure-based-on-a-existing-one

Dear All,

I have a structure A as below

A
a1[1*1]
a21[1*1] a22[1*1]
a31[1*1] a32[1*1] a33[1*1] a34[1*1]

I want to get a new A as following

A new
a1[1*1] same as before
a21[1*1] a21[1*1] a22[1*1]  a22[1*1]
a31[1*1] a31[1*1]  a32[1*1] a32[1*1] a33[1*1] a33[1*1] a34[1*1] a34[1*1]

eg a21 is just refering the element in the structure and 1*1 is the dimension for each element, here it is a number.

For further usage I have to store it in this structure. Thanks a lot in advance

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Jan 2013-2-8

Please use valid Matlab syntax to describe your data. It is inefficient if we have to guess the details. Thanks.

Skirt Zhang 2013-2-8

编辑：Skirt Zhang 2013-2-8

在 MATLAB Online 中打开

A is a matrix like structure a1[1*1] is the first and the only element on line one a21[1*1] a22[1*1] are the only two elements on the 2nd line and so on

a1 is as below (like a tree branch)

       *  -->0.1
   1
       * -->0.9

1 is stored in A{1}.parent o.1 is stored in A{1}.childdown o.9 is stored in A{1}.childup

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Answer 1

Thorsten 2013-2-8

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https://ww2.mathworks.cn/matlabcentral/answers/62698-how-can-i-create-a-new-structure-based-on-a-existing-one#answer_74252

If you want to build a structure A of class struct (such that >> class(A) yields 'ans = struct') you cannot do it because the fields of the struct a1, a22 etc have to have different names. Or is your 'structure A' a matrix?