struct concatenation

[c.]

Hi,

Say you have two struct variables

>> s1
s1 =

  scalar structure containing the fields:

    a: 1x1 scalar
    b: 1x1 scalar

>> s2
s2 =

  scalar structure containing the fields:

    c: 1x1 scalar
    d: 1x1 scalar

and I want to create a new struct s that contains all fields of both.
what would be a clean way of doing this? 

All I came up with for the moment was cycling over s1 and s2 and assigning 
each field to s, is there a better way?

c.