Date | Time | Lt |
2006/12/1 | 0:15:00 | 78.1 |
2006/12/1 | 0:30:00 | 74.8 |
2006/12/1 | 0:45:00 | 74.8 |
2006/12/1 | 1:00:00 | 75.4 |
2006/12/1 | 1:15:00 | 75.4 |
2006/12/1 | 1:30:00 | 71.6 |
2006/12/1 | 1:45:00 | 70.7 |
2006/12/1 | 2:00:00 | 69.2 |
2006/12/1 | 2:15:00 | 71 |
2006/12/1 | 2:30:00 | 70 |
2006/12/1 | 2:45:00 | 65.6 |
2006/12/1 | 3:00:00 | 64.5 |
2006/12/1 | 3:15:00 | 65.9 |
Date | Time | Lt |
2006/12/1 | 0:15:00 | 75.1 |
2006/12/1 | 0:30:00 | 76.8 |
2006/12/1 | 0:45:00 | 73.8 |
2006/12/1 | 1:00:00 | 73.4 |
2006/12/1 | 1:15:00 | 76.4 |
2006/12/1 | 1:30:00 | 71.6 |
2006/12/1 | 1:45:00 | 70.7 |
2006/12/1 | 2:00:00 | 69.2 |
2006/12/1 | 2:15:00 | 71 |
2006/12/1 | 2:30:00 | 70 |
2006/12/1 | 2:45:00 | 67.6 |
2006/12/1 | 3:00:00 | 64.5 |
2006/12/1 | 3:15:00 | 68.9 |
两个数据集,只有变量Lt的值不同,求对应变量Lt的平均值,生成一个新的数据集,包含Date、Time、Lt(平均值)。