[X,Incl,Range] = db2tseries(D,List,Range)
D [ struct ] - Input database with tseries objects that will be combined in one multivariate tseries object.
List [ char | cellstr ] - List of tseries names that will be combined.
Range [ numeric | Inf ] - Date range.
X [ numeric ] - Combined multivariate tseries object.
Incl [ cellstr ] - List of tseries names that have been actually found in the database.
Range [ numeric ] - The date range actually used.