MATLAB: Quick overview over a variable (e.g. struct)

Question

Hello all, unfortunatly I have not found a answer to this question. I have a large object, stored as 'struct'. What I need is a quick overview over all the fields of the struct. I do not need to see the values which are stored in those fields. E.g.: The struct is

S.a=...
S.b=...
S.c=...
...

I want to have this answer:

ans = S.a, S.b, S.c

or even this:

ans = a, b, c

Thank you very much for your help !

Answer 1

Simply call fieldnames:

fieldnames(S)