How to get string field from struct with each element separated

Question

Adel Sarhan 2019-5-11

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/461477-how-to-get-string-field-from-struct-with-each-element-separated

评论： Rik 2023-5-26

>> x.name
ans =
    '1.33'
ans =
    '1.34'
ans =
    '1.35'
    
>> y = [x.name]
y =
    '1.331.341.35'

I want to get it like that

y = ['1.33' '1.34' '1.35']

as a matrix with three string elements

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Stephen23 2023-5-26

在 MATLAB Online 中打开

y = {x.name}

https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html

https://www.mathworks.com/matlabcentral/answers/1656435-tutorial-comma-separated-lists-and-how-to-use-them

Rik 2023-5-26

在 MATLAB Online 中打开

And if a string vector is a true requirement, the conversion is easy:

x = struct('name',{'1.33','1.34','1.35'}) % reconstruct the data from OP
x = 1×3 struct array with fields:
    name
y = {x.name}
y = 1×3 cell array
    {'1.33'}    {'1.34'}    {'1.35'}
z = string(y)
z = 1×3 string array
    "1.33"    "1.34"    "1.35"

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Answer 1

gonzalo Mier 2019-5-11

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/461477-how-to-get-string-field-from-struct-with-each-element-separated#answer_374511

The problem is you are using char instead of string. '1.33' is a vector of char, so if you make a vector of vectors, it compiles them in a row. To make them string you can write "1.33" instead of '1.33' or string('1.33').

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gonzalo Mier 2019-5-11

在 MATLAB Online 中打开

for i= 1:length(x)
    y(i) = string(x(i).name);
end

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How to get string field from struct with each element separated

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