| attr | prod1 | prod2 | prod3 | prod4 | prod5 |
| attr1 | 6 | 6 | 5 | 6 | 5 |
| attr2 | 7 | 4 | 5 | 7 | 6 |
| attr3 | 5 | 4 | 5 | 5 | 6 |
| attr4 | 4 | 5 | 6 | 5 | 5 |
| attr5 | 6 | 5 | 7 | 6 | 6 |
| attr6 | 5 | 5 | 7 | 6 | 6 |
| attr7 | 4 | 6 | 6 | 5 | 6 |
| attr8 | 7 | 7 | 6 | 6 | 6 |
| attr9 | 6 | 7 | 6 | 6 | 7 |
| attr10 | 6 | 7 | 5 | 6 | 6 |
| attr11 | 6 | 6 | 5 | 6 | 5 |
| attr12 | 4 | 6 | 4 | 6 | 6 |
| attr13 | 5 | 5 | 4 | 5 | 4 |
| attr14 | 5 | 6 | 5 | 6 | 5 |
| attr15 | 5 | 6 | 5 | 5 | 6 |
对于上面的数据怎么用SAS编程,需要做的分析是preference mapping。prod是指product,attr是指attribute。每个数值是相应的每种产品在每个Attribute上的得分。请教各位高手!非常感谢啊!