#122 — Put Every N Members in a Group

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Problem description & analysis:

Here below is a data table:

Task: We want to put every 4 rows in order in a group, and calculate the serial number of the group and the sum of the values in the second column of each group.

Solution:

Use SPL XLL and enter the following one-line code:

=spl("=E@b(?1).groups((#-1)\4+1:ID;sum(#2):Total)",A1:B12)

The results are as follows:

To put every 4 rows in a group, we can group by the result of (#-1)\4+1, that is, subtract 1 from row number # to get the difference, divide the difference by 4 to get the quotient, and add 1 to the quotient. After grouping, we can count the sum of the values in the second column of each group.

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