I have bi-weekly measurements and in total 23 measurements per country. I want to convert the days of measurements which corresponds to days in months to simply numbering these measurement occasions from 1 to 23 for all countries. I want them to be categorical. Thank you. location,day Austria,14 Austria,28 Austria,11 Austria,25 Austria,11 Austria,25 Austria,8 Austria,22 Austria,6 Austria,20 Austria,3 Austria,17 Austria,1 Austria,15 Austria,29 Austria,12 Austria,26 Austria,9 Austria,23 Austria,7 Austria,21 Austria,4 Austria,18 Belgium,14 Belgium,28 Belgium,11 Belgium,25 Belgium,11 Belgium,25 Belgium,8 Belgium,22 Belgium,6 Belgium,20 Belgium,3 Belgium,17 Belgium,1 Belgium,15 Belgium,29 Belgium,12 Belgium,26 Belgium,9 Belgium,23 Belgium,7 Belgium,21 Belgium,4 Belgium,18 Bulgari,14 Bulgari,28 Bulgari,11 Bulgari,25 Bulgari,11 Bulgari,25 Bulgari,8 Bulgari,22 Bulgari,6 Bulgari,20 Bulgari,3 Bulgari,17 Bulgari,1 Bulgari,15 Bulgari,29 Bulgari,12 Bulgari,26 Bulgari,9 Bulgari,23 Bulgari,7 Bulgari,21 Bulgari,4 Bulgari,18
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