Sort fields of struct by length and alphabetically

I've been trying to sort the fields of a struct by combination of length and name. Length should take precedence, but if the length of two or more fields is equal (for example if they are scalar), those should be sorted alphabetically (within that group), where names starting with capital letter should take precedence. I'm coming up with nothing that works. Anybody?

Best regards MC

[KAE]

The built in function orderfields might help.

Answer 1

[Stephen23]

S.aa = rand(3,1);
S.bb = 1;
S.cc = rand(8,2);
S.dd = 1;
S.Ee = 1;
S.Ff = rand(3,1)

S = struct with fields:
    aa: [3×1 double]
    bb: 1
    cc: [8×2 double]
    dd: 1
    Ee: 1
    Ff: [3×1 double]

Method one: sort and indexing:

N = structfun(@numel,S);
F = fieldnames(S);
[~,X] = sort(F);
[~,Y] = sort(N(X),'descend');
Z = orderfields(S,F(X(Y)))

Z = struct with fields:
    cc: [8×2 double]
    Ff: [3×1 double]
    aa: [3×1 double]
    Ee: 1
    bb: 1
    dd: 1

Method two: table and sortrows:

[~,X] = sortrows(table(N,F),[-1,2]);
Z = orderfields(S,F(X))

Z = struct with fields:
    cc: [8×2 double]
    Ff: [3×1 double]
    aa: [3×1 double]
    Ee: 1
    bb: 1
    dd: 1

[Michel C]

Thank you! Works like a charm