Find the matlab installation ISO is the primary thing , just don't forget the Google that will help you .
After that you need to mount it to get the file from the ISO ,
sudo mount -o loop,iocharset=gb2312 /path/to/matlab.iso /path/to/put/installation/file
Make sure you owe the /path/to/put/installation/file
If not just make new folder with your own account
or
sudo ./install
A dialog will pop up then choose the option of
without using internet
OK->YES->choose /path/to/intall/matlab ->OK ,a dialog request installation key ,fill in