我有如下数据,想实现分时间组对p求和,该怎么办呢?
time P1 P2 P3
1 11 12 15
1 23 11 17
.2 323 0 18
2 123 89 90
3 762 1 18
想对每一列对按照时间分组求和,就是分别求出P1,P2,P3下time=1是对应数的和,time=2是等等
先谢谢各位大侠

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楼主: seelovesa
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[问答] 请教:如何循环分组求和 |
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