How can I merge two data sets with the same column names to format perfectly into a single data chart?
merge(Divvy_Trips_2019_NEW,Divvy_Trips_2020_Q1,by=c("start_time","end_time","start_station_name","start_station_id","end_station_name","end_station_id","user_type")) Error in fix.by(by.x, x) : 'by' must specify uniquely valid columns