Dear Forum,

I am rearranging my dataset to fit my method, but I got stuck trying to combine rows that have the same inputs. As you can see in the picture, the first 255 rows have the same observations. I want to combine these 255 rows into 1 row. The same for all the other rows. So I would go from 263,536 rows to 2365 rows.

Thanks in advance,
Kind regards,
Caro
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