为了绘制每个ggplot图9个直方图,我使用了以下数据:
id variable value
1 Segment III | RIM BlackBerry Pearl | 5.600000
2 Display size | RIM BlackBerry Pearl | 6.500000
3 Voice/call quality | RIM BlackBerry Pearl | 5.600000
4 Instant messaging availability | RIM BlackBerry Pearl | 7.200000
5 Media quality | RIM BlackBerry Pearl | 6.100000
6 Ease of use for typing | RIM BlackBerry Pearl | 5.700000
7 Speed in accessing email | RIM BlackBerry Pearl | 6.400000
8 Segment II | RIM BlackBerry Pearl …