Hi,
I have a data frame that looks something like this:
id day k
656 -1 566
663 -1 680
673 -1 773
675 -1 761
704 -1 685
714 -1 636
717 -1 421
719 -1 645
727 -1 761
731 -1 663
11 735 -1 603
12 738 -1 865
13 742 -1 594
14 744 -1 601
15 747 -1 816
16 749 -1 802
17 753 -1 811
18 761 -1 585
19 768 -1 644
20 771 -1 649
21 772 -1 679
22 788 -1 467
23 799 -1 572
24 81 -1 446
25 656 2 298
26 663 2 273
27 673 2 837
28 675 2 830
29 704 2 297
30 714 2 255
31 717 2 197
32 719 2 756
33 727 2 844
34 731 2 265
35 735 2 228
36 738 2 913
37 742 2 250
38 744 2 837
39 747 2 316
40 749 2 871
41 753 2 455
42 761 2 893
43 768 2 916
44 771 2 797
45 772 2 371
46 788 2 659
47 799 2 398
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