How do I assign the same value to every field, including nested fields of a structure?

Question

John Petersen 2016-2-25

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https://ww2.mathworks.cn/matlabcentral/answers/270079-how-do-i-assign-the-same-value-to-every-field-including-nested-fields-of-a-structure

回答： Walter Roberson 2016-2-26

Say I have a structure which has an unknown number of fields and each field may or may not have subfields. I want to assign a certain value to each field value. I would be okay only going two fields deep into the structure.

For example: Let A have fields a,b, and field a has fields c,d, but field b has no fields. I want to assign all fields to be x so that the result is

A.a.c = x;
A.a.d = x;
A.b = x;

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Answer 1

Walter Roberson 2016-2-26

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/270079-how-do-i-assign-the-same-value-to-every-field-including-nested-fields-of-a-structure#answer_211276

在 MATLAB Online 中打开

A = structfun(@(s) layer2(s,x), 'Uniform', 0);

together with

   function r = layer2(s, x)
     if istruct(s)
       fn = fieldnames(s);
       r = cell2struct( repmat({x}, length(fn), 1), fn, 1);
     else
       r = x;
     end
  end