Create Timetables for Finance

Create a timetable with financial data

Functions

`timetable`	Timetable array with time-stamped rows and variables of different types
`fts2timetable`	Convert financial time series objects (`fints`) to timetable object
`table2timetable`	Convert table to timetable
`array2timetable`	Convert homogeneous array to timetable

This example shows how to use timetables to visualize and calculate weekly statistics from simulated daily stock data.

Convert financial time series objects to timetables