methods, DBI (>= 0.3.1), tframe, tframePlus, zoo, xts, its,
tseries(>= 0.10-33), quantmod (>= 0.4-0), gdata
methods, DBI (>= 0.3.1), tframe, tframePlus, stats, zoo,
tseries(>= 0.10-33), quantmod (>= 0.4-0), gdata