MATLAB: How to index every field of a structure and reassign to a structure with a single element in each field

Question

I have a structure where every field is an array of the same length. I need to pass this structure on but only with a single element in each field. I thought of doing it this way

A.b = [1:10];
A.c = [2:11];
A.d = [3:12];
a = structfun(@(x) x(1),A)

but this results in

a = [1;2;3];

The answer I want for the first element is

a.b = 1;
a.c = 2;
a.d = 3;

I will want to run this in a for loop for use in the next function like this

for ii = 1:length(A.b)
     ...
    a = structfun(@(x) x(ii),A); % but modified so that 'a' is a struct like 'A', not an array.
    nextfcn(a);
     ...
end

Answer 1

A.b = [1:10];
A.c = [2:11];
A.d = [3:12];
a= A ;
for f=fieldnames(a)'
    a.(f{1})(2:end)=[]; 
end