From: Markthomas on
I have a structure labeled Gr_4e10 which have the following data inside:

Gr_4e10.Q
Gr_4e10.Ar

and so forth

i also have a structure called Gr_5e10 which looks the same as above:

Gr_5e10.Q
Gr_5e10.Ar

How can i combine these under one structure called DATA?
for instance I want it to look like:

DATA.Gr_4e10
DATA.Gr_5e10

Thanks
MT