Natural logarithm for financial time series object
log is not recommended. Use timetable instead. For more information, see Convert Financial Time Series Objects fints to Timetables.
newfts = log(tsobj)
newfts = log(tsobj) calculates the natural logarithm (log base e)
of the data series in a financial time series object tsobj. It
returns another time series object, newfts, containing the natural
logarithms.