How to combine array of vectors in R?

To combine array of vectors we can use rbind function. For example, if we have multiple vectors say x, y, z of same size or different sizes but the total number of elements are even then we can use rbind(x,y,z) to combine those vectors. Check out the examples to understand how it works.

Example1

 Live Demo

x1<−rbind(rep(1,5),rep(2,5),rep(3,5)) x1

Output

   [,1] [,2] [,3] [,4] [,5] [1,]  1   1    1    1   1 [2,]  2 2 2 2 2 [3,] 3 3 3 3 3

Example2

 Live Demo

x2<−rbind(rep(4,5),rep(5,5),rep(6,5),rep(7,5),rep(8,5),rep(9,5),rep(10,5),rep(11,5),rep(12,5),rep(13,5),rep(14,5),rep(15,5)) x2

Output

   [,1] [,2] [,3] [,4] [,5] [1,] 4    4    4    4   4 [2,] 5    5    5    5   5 [3,] 6    6    6    6   6 [4,] 7    7    7    7   7 [5,] 8    8    8    8   8 [6,] 9    9    9    9   9 [7,] 10   10   10   10  10 [8,] 11   11   11   11  11 [9,] 12   12   12   12  12 [10,] 13   13  13   13  13 [11,] 14   14   14 14   14 [12,] 15   15   15  15   15

Example3

 Live Demo

x3<−rbind(rep(16,5),rep(17,5),rep(18,5),rep(19,5),rep(20,5),rep(21,5),rep(22,5),rep(23,5),rep(24,5),rep(25,5),rep(26,5),rep(27,5),rep(28,5),rep(29,5),rep(30,5)) x3

Output

[,1] [,2] [,3] [,4] [,5] [1,] 16 16 16 16 16 [2,] 17 17 17 17 17 [3,] 18 18 18 18 18 [4,] 19 19 19 19 19 [5,] 20 20 20 20 20 [6,] 21 21 21 21 21 [7,] 22 22 22 22 22 [8,] 23 23 23 23 23 [9,] 24 24 24 24 24 [10,] 25 25 25 25 25 [11,] 26 26 26 26 26 [12,] 27 27 27 27 27 [13,] 28 28 28 28 28 [14,] 29 29 29 29 29 [15,] 30 30 30 30 30

Example4

x<−rbind(x1,x2,x3) x

Output

   [,1] [,2] [,3] [,4] [,5] [1,] 1 1 1 1 1 [2,] 2 2 2 2 2 [3,] 3 3 3 3 3 [4,] 4 4 4 4 4 [5,] 5 5 5 5 5 [6,] 6 6 6 6 6 [7,] 7 7 7 7 7 [8,] 8 8 8 8 8 [9,] 9 9 9 9 9 [10,] 10 10 10 10 10 [11,] 11 11 11 11 11 [12,] 12 12 12 12 12 [13,] 13 13 13 13 13 [14,] 14 14 14 14 14 [15,] 15 15 15 15 15 [16,] 16 16 16 16 16 [17,] 17 17 17 17 17 [18,] 18 18 18 18 18 [19,] 19 19 19 19 19 [20,] 20 20 20 20 20 [21,] 21 21 21 21 21 [22,] 22 22 22 22 22 [23,] 23 23 23 23 23 [24,] 24 24 24 24 24 [25,] 25 25 25 25 25 [26,] 26 26 26 26 26 [27,] 27 27 27 27 27 [28,] 28 28 28 28 28 [29,] 29 29 29 29 29 [30,] 30 30 30 30 30

Example5

 Live Demo

s1<−rbind(rep("A",10),rep("B",10),rep("C",10),rep("D",10),rep("E",10),rep("F",10),rep("G",10),rep("H",10),rep("I",10),rep("J",10),rep("K",10),rep("L",10),rep("M",10),rep("N",10),rep("O",10)) s1

Output

[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [1,] "A" "A" "A" "A" "A" "A" "A" "A" "A" "A" [2,] "B" "B" "B" "B" "B" "B" "B" "B" "B" "B" [3,] "C" "C" "C" "C" "C" "C" "C" "C" "C" "C" [4,] "D" "D" "D" "D" "D" "D" "D" "D" "D" "D" [5,] "E" "E" "E" "E" "E" "E" "E" "E" "E" "E" [6,] "F" "F" "F" "F" "F" "F" "F" "F" "F" "F" [7,] "G" "G" "G" "G" "G" "G" "G" "G" "G" "G" [8,] "H" "H" "H" "H" "H" "H" "H" "H" "H" "H" [9,] "I" "I" "I" "I" "I" "I" "I" "I" "I" "I" [10,] "J" "J" "J" "J" "J" "J" "J" "J" "J" "J" [11,] "K" "K" "K" "K" "K" "K" "K" "K" "K" "K" [12,] "L" "L" "L" "L" "L" "L" "L" "L" "L" "L" [13,] "M" "M" "M" "M" "M" "M" "M" "M" "M" "M" [14,] "N" "N" "N" "N" "N" "N" "N" "N" "N" "N" [15,] "O" "O" "O" "O" "O" "O" "O" "O" "O" "O"

Example6

 Live Demo

s2<−rbind(rep("P",10),rep("Q",10),rep("R",10),rep("S",10),rep("T",10),rep("U",10),rep("V",10),rep("W",10),rep("W",10),rep("Y",10),rep("Z",10)) > s2

Output

[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [1,] "P" "P" "P" "P" "P" "P" "P" "P" "P" "P" [2,] "Q" "Q" "Q" "Q" "Q" "Q" "Q" "Q" "Q" "Q" [3,] "R" "R" "R" "R" "R" "R" "R" "R" "R" "R" [4,] "S" "S" "S" "S" "S" "S" "S" "S" "S" "S" [5,] "T" "T" "T" "T" "T" "T" "T" "T" "T" "T" [6,] "U" "U" "U" "U" "U" "U" "U" "U" "U" "U" [7,] "V" "V" "V" "V" "V" "V" "V" "V" "V" "V" [8,] "W" "W" "W" "W" "W" "W" "W" "W" "W" "W" [9,] "W" "W" "W" "W" "W" "W" "W" "W" "W" "W" [10,] "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" [11,] "Z" "Z" "Z" "Z" "Z" "Z" "Z" "Z" "Z" "Z"

Example7

S<−rbind(s1,s2) S

Output

[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [1,] "A" "A" "A" "A" "A" "A" "A" "A" "A" "A" [2,] "B" "B" "B" "B" "B" "B" "B" "B" "B" "B" [3,] "C" "C" "C" "C" "C" "C" "C" "C" "C" "C" [4,] "D" "D" "D" "D" "D" "D" "D" "D" "D" "D" [5,] "E" "E" "E" "E" "E" "E" "E" "E" "E" "E" [6,] "F" "F" "F" "F" "F" "F" "F" "F" "F" "F" [7,] "G" "G" "G" "G" "G" "G" "G" "G" "G" "G" [8,] "H" "H" "H" "H" "H" "H" "H" "H" "H" "H" [9,] "I" "I" "I" "I" "I" "I" "I" "I" "I" "I" [10,] "J" "J" "J" "J" "J" "J" "J" "J" "J" "J" [11,] "K" "K" "K" "K" "K" "K" "K" "K" "K" "K" [12,] "L" "L" "L" "L" "L" "L" "L" "L" "L" "L" [13,] "M" "M" "M" "M" "M" "M" "M" "M" "M" "M" [14,] "N" "N" "N" "N" "N" "N" "N" "N" "N" "N" [15,] "O" "O" "O" "O" "O" "O" "O" "O" "O" "O" [16,] "P" "P" "P" "P" "P" "P" "P" "P" "P" "P" [17,] "Q" "Q" "Q" "Q" "Q" "Q" "Q" "Q" "Q" "Q" [18,] "R" "R" "R" "R" "R" "R" "R" "R" "R" "R" [19,] "S" "S" "S" "S" "S" "S" "S" "S" "S" "S" [20,] "T" "T" "T" "T" "T" "T" "T" "T" "T" "T" [21,] "U" "U" "U" "U" "U" "U" "U" "U" "U" "U" [22,] "V" "V" "V" "V" "V" "V" "V" "V" "V" "V" [23,] "W" "W" "W" "W" "W" "W" "W" "W" "W" "W" [24,] "W" "W" "W" "W" "W" "W" "W" "W" "W" "W" [25,] "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" [26,] "Z" "Z" "Z" "Z" "Z" "Z" "Z" "Z" "Z" "Z"