Athens_approved_ts      Time series of Approved Expenditure Budget
                        Phase of Municipality of Athens
Athens_draft_ts         Time series of Draft Expenditure Budget Phase
                        of Municipality of Athens
Athens_executed_ts      Time series of Executed Expenditure Budget
                        Phase of Municipality of Athens
Athens_reserved_ts      Time series of Reserved Expenditure Budget
                        Phase of Municipality of Athens
Athens_revised_ts       Time series of Revised Expenditure Budget Phase
                        of Municipality of Athens
open_spending.ts        Read and analyze univariate time series data
                        from Open Spending API
ts.acf                  Extract the ACF and PACF parameters of time
                        series and their model residuals
ts.analysis             Time series analysis results for OBEU Time
                        series
ts.forecast             Time series forecast results of OBEU Time
                        Series
ts.non.seas.decomp      Non seasonal decomposition
ts.non.seas.model       Model fit of non seasonal time series
ts.seasonal.decomp      Decomposition of seasonal time series
ts.seasonal.model       Model fit of seasonal time series
ts.stationary.test      Stationarity testing
