S=load(websave('split_mat.mat','https://www.mathworks.com/matlabcentral/answers/uploaded_files/709142/split_mat.mat'));
split_mat=S.split_mat;
x=cellfun(@(x)str2double(split(x,',')).',split_mat,'UniformOutput',false);
format('compact'),celldisp(x)
x{1} =
1
x{2} =
2
x{3} =
1 3
x{4} =
2 4
x{5} =
3 5
x{6} =
4 6
x{7} =
1 1 1 5 7
x{8} =
1 2 2 2 6 8
x{9} =
2 3 3 3 7 9
x{10} =
3 4 4 4 8 10
x{11} =
4 5 5 5 9 11
x{12} =
5 6 6 6 10 12
x{13} =
6 7 7 7 11 13
x{14} =
1 1 1 9 10 10 10 14
x{15} =
2 2 2 10 11 11 11 15
x{16} =
3 3 3 11 12 12 12 16
x{17} =
4 4 4 12 13 13 13 17
x{18} =
5 5 5 13 14 14 14 18
x{19} =
6 6 6 14 15 15 15 19
x{20} =
7 7 7 15 16 16 16 20
x{21} =
8 8 8 16 17 17 17 21
x{22} =
9 9 9 17 18 18 18 22
x{23} =
10 10 10 18 19 19 19 23
x{24} =
11 11 11 19 20 20 20 24
x{25} =
12 12 12 20 21 21 21 25
x{26} =
13 13 13 21 22 22 22 26
x{27} =
14 14 14 22 23 23 23 27
x{28} =
15 15 15 23 24 24 24 28
x{29} =
16 16 16 24 25 25 25 29
x{30} =
17 17 17 25 26 26 26 30
x{31} =
1 18 18 18 26 27 27 27 31
x{32} =
2 19 19 19 27 28 28 28 32
x{33} =
3 20 20 20 28 29 29 29 33
x{34} =
4 21 21 21 29 30 30 30 34
x{35} =
1 5 22 22 22 30 31 31 31 35
x{36} =
2 6 23 23 23 31 32 32 32 36
x{37} =
3 7 24 24 24 32 33 33 33 37
x{38} =
4 8 25 25 25 33 34 34 34 38
x{39} =
1 5 9 26 26 26 34 35 35 35 39
x{40} =
2 6 10 27 27 27 35 36 36 36 40
x{41} =
3 7 11 28 28 28 36 37 37 37 41
x{42} =
1 4 8 12 29 29 29 37 38 38 38 42
x{43} =
2 5 9 13 30 30 30 38 39 39 39 43
x{44} =
3 6 10 14 31 31 31 39 40 40 40 44
x{45} =
4 7 11 15 32 32 32 40 41 41 41 45
x{46} =
5 8 12 16 33 33 33 41 42 42 42 46
x{47} =
6 9 13 17 34 34 34 42 43 43 43 47
x{48} =
7 10 14 18 35 35 35 43 44 44 44 48
x{49} =
8 11 15 19 36 36 36 44 45 45 45 49
x{50} =
9 12 16 20 37 37 37 45 46 46 46 50
x{51} =
10 13 17 21 38 38 38 46 47 47 47 51
x{52} =
11 14 18 22 39 39 39 47 48 48 48 52
x{53} =
12 15 19 23 40 40 40 48 49 49 49 53
x{54} =
13 16 20 24 41 41 41 49 50 50 50 54
x{55} =
14 17 21 25 42 42 42 50 51 51 51 55
x{56} =
15 18 22 26 43 43 43 51 52 52 52 56
x{57} =
16 19 23 27 44 44 44 52 53 53 53 57
x{58} =
17 20 24 28 45 45 45 53 54 54 54 58
x{59} =
18 21 25 29 46 46 46 54 55 55 55 59
x{60} =
19 22 26 30 47 47 47 55 56 56 56 60
x{61} =
20 23 27 31 48 48 48 56 57 57 57 61
x{62} =
21 24 28 32 49 49 49 57 58 58 58 62
x{63} =
22 25 29 33 50 50 50 58 59 59 59 63
x{64} =
23 26 30 34 51 51 51 59 60 60 60 64
x{65} =
24 27 31 35 52 52 52 60 61 61 61 65
x{66} =
25 28 32 36 53 53 53 61 62 62 62 66
x{67} =
26 29 33 37 54 54 54 62 63 63 63 67
x{68} =
27 30 34 38 55 55 55 63 64 64 64 68
x{69} =
28 31 35 39 56 56 56 64 65 65 65 69
x{70} =
29 32 36 40 57 57 57 65 66 66 66 70
x{71} =
30 33 37 41 58 58 58 66 67 67 67 71
x{72} =
31 34 38 42 59 59 59 67 68 68 68 72
x{73} =
32 35 39 43 60 60 60 68 69 69 69 73
x{74} =
33 36 40 44 61 61 61 69 70 70 70 74
x{75} =
34 37 41 45 62 62 62 70 71 71 71 75
x{76} =
35 38 42 46 63 63 63 71 72 72 72 76
x{77} =
36 39 43 47 64 64 64 72 73 73 73 77
x{78} =
37 40 44 48 65 65 65 73 74 74 74 78
x{79} =
38 41 45 49 66 66 66 74 75 75 75 79