Hello List,

I have input data such as far below:

I would like to read the data into an array and modify the 2nd index if the
0th and first indices are identical.
I would like the updated 2nd index to be an average of the 2nd index where
both occurences of 0th and 1st indices match.

So for example below:

The records that contain 24 1 I would like to average the second index 60
and 40

and print the new value like this:

... # print input data
24 1 50 65
24 1 50 65
... # print rest of input data




22 1 60 65
22 2 180 90
22 3 300 90
23 1 0 65
23 2 90 65
23 3 260 65
24 1 60 65
24 1 40 65
24 2 180 65
24 2 160 65
24 3 310 65
24 3 290 65
25 1 0 90
25 2 120 65
25 3 240 65
26 1 60 65
26 2 180 65
26 3 320 65
87 1 355 65
87 2 100 65
87 3 245 65
87 3 180 65
88 1 100 65
88 2 210 65
88 3 310 65

Thank you in advance.

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