gives the content of a database
[l]=dblist(filein,arg1,...,argn)
* filein = name of the database
* argi =
- 'matlab' if the database is a matlab one
- a string of the type '***xxx****', '>xxx', 'xxx>' or '>xxx>;' to search data whose names contain the specified character 'xxx' either at a precise place (case of stars) or at any place (case of '>')
* l = column vector containing the names of variables in the database