Which part are you having problems with? And what are you trying to send/receive? The stamp can talk/listen to the serial data using serin/serout but I don't know about matlab.
This has been covered in a few different posts. You should be able to locate them with the Google search engine for the forums at search.parallax.com. Use the advanced search option, and in the domain box type in forums.parallax.com.
Comments
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
- Stephen