mix several .mat files into one

Hello, I have 10 mat files a1 to a10 like (a1=[1 2 3], a2=[4 5 6], a3=[7 8 9]...a10=[28 29 30]), I like to just combine all in one mat file like this: total=[1 2 3 4 5 .....30]. can anybody help me please?

[Adam]

Just read them all in, create 'total' and write the new mat file out. Obviously it would have been easier if you hadn't created so many independent numbered variables in the first place!

[Marry M]

looks nice, can you please give me an example how can i do that?