how to delete field in struct in loop?

In have struct A having fields A1(2x1), A2(2x1), A3(12x1) ....A100(23x1). I want to delete fields whose size is (2x1). how to delete it

Answer 1

[Andrei Bobrov]

n1 = fieldnames(A);
Aout = rmfield(A,n1(cellfun(@numel,struct2cell(A)) == 2));