j*****l
发帖数: 73 | 1 数据：
attraction.txt
自变量：
State: 1 = iowa
2 = colorado
3 = california
4 = washington
5 = new york
Attraction type:
1 = park
2 = zoo
3 = cave
4 = montain
5 = museum
6 = recreation park
.
11 = others
payment: 0 = visitor has not to pay
1 = visitor has to pay
visitor: number of paying visitor in 2008
Question:
1. We restrict the dataframe to attraction (5, 7, 8, 10). In | m****o
发帖数: 114 | | T******r
发帖数: 265 | |
|
