Using Excel to Sum Ranges of Cells That Meet Certain Criteria

Question

Here is a better update. I've included a screenshot that illustrates what I am trying to do. I am trying to write a function that does this automatically instead of me having to do it all manually.

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I have an Excel sheet that contains 6,568 rows of data. For one of the columns, E, I am trying to create subtotals for all of the times that the flow rate drops below 5. I have included a screenshot as an example.

What am I trying to do is create a function that scans the entirety of column E and sums up the times (column A) for when the value of column E is below 5.

I thought I could do this when an IF statement, but I do not think that is the best way. Maybe "SUMIF", but I don't think that is right either. Is this something better suited for VBA?

This is what I started with:

IF(E2270<5, IF(E2271<5), blah blah blah)

I am a little stumped here though. Any help is appreciated.

EDIT

Here is a screenshot with headers

Answer 1

以下是我认为您正在寻找的内容：

情侣列：

Col C.少于5？

=IF(B2<=5, C1+1, 0)

这是一个辅助行，它计算自我们进入＆lt; 5期间以来的单元格数。这将有助于我们创建我们需要的范围。

Col D.是最后一个吗？

=IF(AND(C2>0, C3=0), 1, 0) 

这只是一个简单的布尔值，如果这是一个句点的结束，那么我们应该进行计算。

Col E.流量总和

=IF(D2=1, SUM(OFFSET(B2, -1*(C2-1), 0, C2, 1)), "")

如果这是期间的结束，则将从当前时间段到期间开始的流量相加。我们通过从最高的最小值到当前值执行一系列Col C. Less than 5?行和1列来完成此操作。

Col F.流动时间

=IF(D2=1, A2-OFFSET(A2, -1*(C2-1), 0), "")

这与Col E类似。如果时间间隔一致，那么您可以将时间间隔乘以Col C而不是减去。

您现在可以隐藏Col C和Col D，因为它们不需要显示。