How can I get the values from my structure?

Question

Abner Ojeda 2020-5-1

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https://ww2.mathworks.cn/matlabcentral/answers/522339-how-can-i-get-the-values-from-my-structure

评论： Ameer Hamza 2020-5-1

Hey, maybe my question is pretty easy to solve. I have a struct array, build by a "solve" function. I need to get those values, but I don't know how many values the struct could get, because it depends in the input of the user. As you can see, this make it well but only for 2 values, if I get a structure for 3 values even if I change the value of "i" it doesn't work. Thanks in advance for all your help.

pc=solve (y, [x]);
pucr= fieldnames (pc);
for i= 1:2 
    vals(i, 1)= getfield(pc,pucr{i});
end

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Answer 1

Ameer Hamza 2020-5-1

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https://ww2.mathworks.cn/matlabcentral/answers/522339-how-can-i-get-the-values-from-my-structure#answer_429696

在 MATLAB Online 中打开

Use numel() to fine the number of elements in pucr.

pc=solve (y, [x]);
pucr= fieldnames (pc);
for i= 1:numel(pucr) 
    vals(i, 1)= getfield(pc,pucr{i});
end

Now the for loop will run as many times as the number of fields in pucr.

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Abner Ojeda 2020-5-1

I've just tried it and it works pretty well. I tried with different numbers of variables (1, 5, 10, 8), in all cases works awesome. Thanks for the help, Ameer :)