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How to create a large vector with repetitive elements of varying size in R?
To create a large vector of repetitive elements of varying size we can use the rep function along with the logical vector as an index. The logical vector that contains TRUE or FALSE will define the selection or omission of the values in the vector created with the help of rep function as shown in the below examples. If the vector created by using rep is larger than the logical vector then the logical vector will be recycled.
Example1
x1<−rep(1:100,each=2)[c(TRUE,FALSE)] x1
Example
x1<−rep(1:100,each=2)[c(TRUE,TRUE)] x1
Output
[1] 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 [19] 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 [37] 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 [55] 28 28 29 29 30 30 31 31 32 32 33 33 34 34 35 35 36 36 [73] 37 37 38 38 39 39 40 40 41 41 42 42 43 43 44 44 45 45 [91] 46 46 47 47 48 48 49 49 50 50 51 51 52 52 53 53 54 54 [109] 55 55 56 56 57 57 58 58 59 59 60 60 61 61 62 62 63 63 [127] 64 64 65 65 66 66 67 67 68 68 69 69 70 70 71 71 72 72 [145] 73 73 74 74 75 75 76 76 77 77 78 78 79 79 80 80 81 81 [163] 82 82 83 83 84 84 85 85 86 86 87 87 88 88 89 89 90 90 [181] 91 91 92 92 93 93 94 94 95 95 96 96 97 97 98 98 99 99 [199] 100 100
Example
x1<−rep(1:100,each=2)[c(TRUE,TRUE,FALSE)] x1
Output
[1] 1 1 2 3 4 4 5 6 7 7 8 9 10 10 11 12 13 13 [19] 14 15 16 16 17 18 19 19 20 21 22 22 23 24 25 25 26 27 [37] 28 28 29 30 31 31 32 33 34 34 35 36 37 37 38 39 40 40 [55] 41 42 43 43 44 45 46 46 47 48 49 49 50 51 52 52 53 54 [73] 55 55 56 57 58 58 59 60 61 61 62 63 64 64 65 66 67 67 [91] 68 69 70 70 71 72 73 73 74 75 76 76 77 78 79 79 80 81 [109] 82 82 83 84 85 85 86 87 88 88 89 90 91 91 92 93 94 94 [127] 95 96 97 97 98 99 100 100
Example2
x2<−rep(0:1,each=100)[c(TRUE,TRUE,FALSE,TRUE,FALSE)] x2
Output
[1] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 [38] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 [75] 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 [112] 1 1 1 1 1 1 1 1 1
Example3
x3<−rep(1:50,each=5)[c(TRUE,FALSE,TRUE,TRUE,TRUE)] x3
Output
[1] 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 5 5 5 5 6 6 6 6 7 [26] 7 7 7 8 8 8 8 9 9 9 9 10 10 10 10 11 11 11 11 12 12 12 12 13 13 [51] 13 13 14 14 14 14 15 15 15 15 16 16 16 16 17 17 17 17 18 18 18 18 19 19 19 [76] 19 20 20 20 20 21 21 21 21 22 22 22 22 23 23 23 23 24 24 24 24 25 25 25 25 [101] 26 26 26 26 27 27 27 27 28 28 28 28 29 29 29 29 30 30 30 30 31 31 31 31 32 [126] 32 32 32 33 33 33 33 34 34 34 34 35 35 35 35 36 36 36 36 37 37 37 37 38 38 [151] 38 38 39 39 39 39 40 40 40 40 41 41 41 41 42 42 42 42 43 43 43 43 44 44 44 [176] 44 45 45 45 45 46 46 46 46 47 47 47 47 48 48 48 48 49 49 49 49 50 50 50 50
Example4
x4<−rep(1:100,each=5)[c(TRUE,FALSE,TRUE)] x4
Output
[1] 1 1 1 2 2 2 2 3 3 3 4 4 4 5 5 5 5 6 [19] 6 6 7 7 7 8 8 8 8 9 9 9 10 10 10 11 11 11 [37] 11 12 12 12 13 13 13 14 14 14 14 15 15 15 16 16 16 17 [55] 17 17 17 18 18 18 19 19 19 20 20 20 20 21 21 21 22 22 [73] 22 23 23 23 23 24 24 24 25 25 25 26 26 26 26 27 27 27 [91] 28 28 28 29 29 29 29 30 30 30 31 31 31 32 32 32 32 33 [109] 33 33 34 34 34 35 35 35 35 36 36 36 37 37 37 38 38 38 [127] 38 39 39 39 40 40 40 41 41 41 41 42 42 42 43 43 43 44 [145] 44 44 44 45 45 45 46 46 46 47 47 47 47 48 48 48 49 49 [163] 49 50 50 50 50 51 51 51 52 52 52 53 53 53 53 54 54 54 [181] 55 55 55 56 56 56 56 57 57 57 58 58 58 59 59 59 59 60 [199] 60 60 61 61 61 62 62 62 62 63 63 63 64 64 64 65 65 65 [217] 65 66 66 66 67 67 67 68 68 68 68 69 69 69 70 70 70 71 [235] 71 71 71 72 72 72 73 73 73 74 74 74 74 75 75 75 76 76 [253] 76 77 77 77 77 78 78 78 79 79 79 80 80 80 80 81 81 81 [271] 82 82 82 83 83 83 83 84 84 84 85 85 85 86 86 86 86 87 [289] 87 87 88 88 88 89 89 89 89 90 90 90 91 91 91 92 92 92 [307] 92 93 93 93 94 94 94 95 95 95 95 96 96 96 97 97 97 98 [325] 98 98 98 99 99 99 100 100 100
Updated on: 08-Feb-2021
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