#144 — Insert Row after Specific Row

Problem description & analysis:

Here below is a data table:

Task: Insert one row after the number 100, and fill in a001, a002, … in turn, like this:

Solution:

Use SPL XLL and enter the following code:

=spl("=E@b(?1).group@i(~[-1].#1==100).(~|new(string(#,""a000""):_1)).conj()",A1:A9)

Code explanation: Group the data. When the value in column A of the previous row is 100, create a new group.
Loop through each group, insert a record at the end of the group, whose value of the first column is the current group number #, formatted with “a000”.

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