Function Reference
— Function File: [k1, ..., v1] = setfield (s, k1, v1, ...)

Set field members in a structure.

          oo(1,1).f0= 1;
          oo = setfield(oo,{1,2},'fd',{3},'b', 6);
          oo(1,2).fd(3).b == 6
           ans = 1

Note that this function could be written

                   i1= {1,2}; i2= 'fd'; i3= {3}; i4= 'b';
                   oo( i1{:} ).( i2 )( i3{:} ).( i4 ) == 6;