for example, case of 5 number.(1..5)
1. Let Cells[A2 to A6] and Cells[B1 to F1] be these numbers.
2. type the formula "=ABS($A2-B$1) " in the cell[B2]. Drag the formula until Cell[F6] and you will get all |Xi-Xj| in the matrix.
        1        2        3        4        5
1        0        1        2        3        4
2        1        0        1        2        3
3        2        1        0        1        2
4        3        2        1        0        1
5        4        3        2        1        0

3.Do the same thing for getting PiPj.
4.Use the formula "=sumproduct(matrix1,matrix2)" to get the result.

excel can do it. i've made 2 matrices to do do it(not a smart way but it works). One calculates |xi- xj|, another calculate pipj, and then use "sumproduct" to find the answer.

how to do it？

求给分

用excel,插入菜单中的插入函数,加法用sum,加减乘除乘方都可以直接输入公式,方法:数据输入后,在新的单元格中输入等号选中第一个数据所在单元格,再输入加减乘除乘方符号,除号是反斜杠/,乘号是星号*,乘方是^,再选中第二个数据所在单元格,最后按回车,如果是两列,在上述操作完后,鼠标再放回计算结果所在单元格,是其右下方出现黑十字,拖住鼠标左键下拉,两列计算结果全出来了