This is not a dumb question; it highlights one of the common mistakes which new programmer make, i.e., creating variable names like var1, var2, var3, ... Then they run into a problem which you mentioned in your question. This thread: https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval have a very useful discussion on this topic.
The correct way to handle such cases is to use arrays. For example, if all of your structs contain the same fields, you can create a struct array like this (a good approach is to create an array from the beginning, however, since you already have these variables, you can now create an array)
struct = [struct1, struct2, struct3, ..]; % write down the name of all the struct variables
Now you will see the thing will become so easy. You can create a for-loop and apply the same code to all the elements in the array
for i = 1:numel(struct)
s = struct(i);
% apply code to s
end
The for loop will iterate over the entire array and apply the code to each struct.
In case, each struct have different fields, you can create a cell array
struct = {struct1, struct2, struct3, ..}; % write down the name of all the struct variables
and the for-loop will be like this
for i = 1:numel(struct)
s = struct{i};
% apply code to s
end
