how to set multiple fields in a struct without using a loop

Hello guys, I have the next problem, I want to make something like this:

A={'A1';'A2';'A3'};

them make B=somefunction(B,A); and obtain this:

B =

    A1: []
    A2: []
    A3: []

Any idea?

[José-Luis]

I don't understand. What's B?

[Lisandro Jimenez]

B is a struct.

[José-Luis]

B is a struct with fields A1, A2 and A3?

[Lisandro Jimenez]

That's right !

Answer 1

[José-Luis]

 A = {'A1';'A2';'A3'};
 your_struct = cell2struct(repmat({[]},3,1),A);

Please accept an answer if it helped you.

[Lisandro Jimenez]

It's better:

 A = {'A1';'A2';'A3'};
 your_struct = cell2struct(repmat({[]},size(A,1),1),A);

Answer 2

[Lisandro Jimenez]

      for i=1:size(A,1)
      B.(A{i})=[];
      end

But this answer has a loop, and I don't know if there's another way more efficent.