m5_demand_type          Classify time series of the particular items
m5_download             Download and unzip the raw data to the
                        specified directory
m5_get_raw              Load raw CSV files using 'data.table::fread()'
                        function
m5_prepare              Prepare the ready-to-use M5 data in one
                        data.frame
tiny_m5                 A subset from M5 Walmart Challenge Dataset in
                        one data frame
