Create a vector with data from a structure named with the field name

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Luis Lopez 2016-4-13

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https://ww2.mathworks.cn/matlabcentral/answers/278809-create-a-vector-with-data-from-a-structure-named-with-the-field-name

编辑： Stephen23 2019-6-19

Hi, I want to créate a vector, currently I've named manually using the next way:

    Actual_Gear_Ratio = [];
>> for i=1:length(x)
Actual_Gear_Ratio=[Actual_Gear_Ratio; x(i).Actual_Gear_Ratio];   % read/concatenate 
  end

What I want to avoid is the necessity to name every vector, I have a cell array (myVars) with all the variable names but I haven't be able to créate all the vectors automatically. I've tried things like this:

for i=1:length(x)
  for j=1:length(myVars)
      myVars(1,j)=[myVars(1,j); x(i).myVars(1,j)];   % read/concatenate
  end
end

Hope you can help me. Thanks

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Stephen23 2016-4-13

编辑：Stephen23 2019-6-19

@Luis Lopez: the structure is a good form of storage. Don't create lots of separate variables: they would be much more difficult to access than what you have now.

http://www.mathworks.com/help/matlab/matlab_prog/string-evaluation.html

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

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Answer 1

Luis Lopez 2016-4-14

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https://ww2.mathworks.cn/matlabcentral/answers/278809-create-a-vector-with-data-from-a-structure-named-with-the-field-name#answer_217867

Oh, I guess so I have to start working with structures. Thanks for your answer is good to know why must be avoided this kind of practices.

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Answer 2

Luis Lopez 2016-4-14

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https://ww2.mathworks.cn/matlabcentral/answers/278809-create-a-vector-with-data-from-a-structure-named-with-the-field-name#answer_217891

How can I concatenate every field to at the end get a 1 x 1 with same original 15 fields in a new structure? i guess this could be really simple but I couldn't find the solution.

Thanks