How to append Struct?

I have 3 structures as follows-

ABC.x=1;
ABC.y=2;
ABC.z=3;

DEF.p=1;
DEF.q=2;

GHI.m=1;
GHI.n=2;

How can I append the values from the last two structs into the first struct? Infact, what I am looking for is somethiong like this-

ABC.x=1;
ABC.y=2;
ABC.z=3;
ABC.p=1;
ABC.q=2;
ABC.m=1;
ABC.n=2;

Answer 1

[Matt J]

One way:

ABC.x=1;
ABC.y=2;
ABC.z=3;

DEF.p=10;
DEF.q=20;

GHI.m=100;
GHI.n=200;


args=[namedargs2cell(ABC), namedargs2cell(DEF),namedargs2cell(GHI)];

ABC=struct(args{:})

ABC = struct with fields:
    x: 1
    y: 2
    z: 3
    p: 10
    q: 20
    m: 100
    n: 200

[Rounak Saha Niloy]

Thanks, I appreciate it.