call out matlab structure using for loop

I have j structures Ts(j) . And the elements inside the structure are just like T(3) below

can I call out e1 e2 e3 by using for loop?

or I can only call they by using Ts(i).e1 Ts(i).e2 Ts(i).e3.

Because I need to check whether e1||e2||e3 third element is 1 or 2 , and now I have j structures.

If I can't use for loop ↓ ,then I ill have three " if "

  for j=1:num_of_Ts
      if Ts(j).e1(:,3)==1
          do...
      end
      if Ts(j).e2(:,3)==1
          do...
      end
      if Ts(j).e3(:,3)==1
          do...
      end
  end

[Stephen23]

https://www.mathworks.com/help/matlab/ref/fieldnames.html

https://www.mathworks.com/help/matlab/matlab_prog/generate-field-names-from-variables.html

Answer 1

[Max Alger-Meyer]

You can absolutely use a loop! The trick is to use the 'fieldnames' function as shown below.

SampleStruct.e1 = [129 152 1];
SampleStruct.e2 = [129 164 2];
SampleStruct.e3 = [152 164 1];

names = fieldnames(SampleStruct);

for i = 1:numel(names)
    disp(SampleStruct.(names{i}))
end

   129   152     1

   129   164     2

   152   164     1

[AI-CHI Chang]

Thanks!! I think this is absolutely what I want