Hello, I urgently need some help.
This is my data imported by 'fread' function.
What I wanna do is reconstruct dataframe with 'id', 'floorspace summed by each ids', 'land_price averaged by each ids'. Variable 'zone' can be ignored right now.
Thus, I wanna transform this disaggregated data into more aggregated data, with the output whose data objects(=row) only exist 1539(right now there are 3613 rows because each id has several floorspace/land_price data)
I would be very appreciate if you give an advice to this newbie.