- Trending Categories
Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How to find the union of two vectors in R?
The union of vectors return all the unique values in both the vectors. For example, if we have a vector x that contains 1, 2, 3, 4, 2, 3, 4, 1, 1, 4 and another vector that contains 2, 1, 2, 4, 5, 7, 5, 1, 2, 3, 7, 6, 5, 7, 4, 2, 4, 1, 5, 8, 1, 3 then the union of these two vectors will be 1, 2, 3, 4, 5, 6, 7, 8. In R, we can do this by using union function.
Example
> x1<-rpois(10,2) > x1
Output
[1] 2 2 0 1 1 1 4 1 2 2
Example
> y1<-rpois(10,5) > y1
Output
[1] 3 5 6 6 10 3 5 9 3 8
Example
> union(x1,y1)
Output
[1] 2 0 1 4 3 5 6 10 9 8
Example
> x2<-rpois(100,5) > x2
Output
[1] 10 5 5 5 4 7 9 3 7 3 5 5 3 3 5 4 4 4 3 6 8 6 5 4 4 [26] 4 2 7 6 9 2 3 3 7 3 1 2 6 3 1 6 8 5 7 5 7 5 4 9 7 [51] 4 8 9 2 4 5 4 11 8 6 2 5 1 1 4 5 2 6 3 5 5 6 8 8 6 [76] 3 6 6 7 7 5 3 5 4 10 3 9 3 3 7 5 6 5 9 2 6 10 4 1 4
Example
> y2<-rpois(100,10) > y2
Output
[1] 8 9 10 11 7 11 7 8 17 11 17 13 6 10 7 6 11 15 7 13 6 9 7 7 4 [26] 18 7 12 8 8 12 16 10 11 11 5 15 9 7 12 7 10 3 8 11 7 9 14 11 10 [51] 11 10 8 11 8 8 6 7 11 8 11 13 8 9 5 19 16 9 8 14 16 6 9 6 9 [76] 10 14 11 11 10 5 11 6 10 11 10 7 11 9 17 12 5 11 8 11 10 13 15 5 10
Example
> union(x2,y2)
Output
[1] 10 5 4 7 9 3 6 8 2 1 11 17 13 15 18 12 16 14 19
Example
> x3<-sample(0:9,200,replace=TRUE) > x3
Output
[1] 1 7 1 7 5 9 2 6 5 8 8 2 5 1 1 7 5 0 0 4 7 3 9 6 4 2 0 8 8 0 9 9 5 4 0 2 5 [38] 0 0 7 0 0 3 0 5 1 2 1 5 1 7 2 8 8 5 7 8 4 8 2 1 8 9 3 9 9 2 8 1 3 3 2 5 2 [75] 7 4 6 0 4 0 2 6 2 9 2 9 7 2 9 4 7 4 2 0 2 9 7 7 5 4 1 8 6 9 2 3 0 9 7 2 3 [112] 9 8 2 4 2 8 9 6 7 2 2 7 2 6 7 4 6 0 7 6 6 3 9 6 2 4 7 4 2 2 7 6 3 8 4 4 2 [149] 0 6 6 5 3 0 8 0 0 6 0 6 1 4 4 5 1 2 4 8 0 5 7 1 8 2 2 5 6 5 2 0 2 5 4 7 2 [186] 9 3 3 2 2 2 0 0 3 8 1 0 0 0 6
Example
> y3<-sample(1:50,200,replace=TRUE) > y3
Output
[1] 2 31 7 14 40 15 14 21 21 16 5 26 21 44 11 18 40 25 5 42 38 45 28 42 4 [26] 19 35 16 32 8 32 33 34 16 44 23 19 11 5 16 12 13 35 7 17 17 16 35 36 32 [51] 17 31 33 13 12 20 48 43 21 36 23 35 21 22 23 1 48 45 27 49 48 42 41 3 37 [76] 2 12 34 16 41 32 39 13 13 37 29 50 22 45 28 12 19 10 31 49 37 20 23 27 33 [101] 20 10 27 33 7 5 35 15 10 7 34 12 1 46 12 2 2 36 13 29 45 4 36 1 27 [126] 42 8 34 24 11 45 39 39 33 12 41 41 45 6 2 16 40 39 14 32 7 29 12 13 16 [151] 33 3 30 2 35 6 33 30 43 25 34 42 38 4 24 40 15 45 18 41 10 9 24 4 42 [176] 11 32 14 8 49 47 6 38 45 20 30 48 26 17 49 34 24 12 31 24 26 3 13 9 6
Example
> union(x3,y3)
Output
[1] 1 7 5 9 2 6 8 0 4 3 31 14 40 15 21 16 26 44 11 18 25 42 38 45 28 [26] 19 35 32 33 34 23 12 13 17 36 20 48 43 22 27 49 41 37 39 29 50 10 46 24 30 [51] 47
Example
> x4<-round(runif(200,2,4)) > x4
Output
[1] 3 3 4 4 4 2 2 3 2 4 4 3 4 2 3 3 3 4 4 3 3 3 3 3 2 4 4 3 3 3 4 3 4 3 4 3 3 [38] 2 3 3 3 3 2 4 2 4 2 3 2 2 3 3 4 3 3 4 3 3 2 2 3 3 3 4 2 3 4 3 3 3 4 3 3 4 [75] 4 4 3 3 3 3 2 3 3 3 3 3 4 2 3 3 2 2 4 3 2 3 3 3 3 2 2 3 3 3 2 2 3 4 3 2 3 [112] 3 2 4 3 3 3 4 3 3 3 3 3 3 4 4 3 3 3 3 4 4 3 4 2 4 4 3 2 2 3 2 3 2 2 3 4 3 [149] 3 2 4 3 2 3 3 3 3 3 4 3 2 2 3 2 4 3 2 3 3 2 4 4 4 3 3 3 2 3 3 3 3 3 3 2 3 [186] 3 3 3 4 4 4 2 4 2 4 4 4 2 4 3
Example
> y4<-round(runif(200,2,10)) > y4
Output
[1] 9 6 3 5 6 2 8 3 9 5 6 4 4 7 6 5 8 3 7 4 5 7 6 7 4 [26] 9 3 10 9 3 6 5 9 3 5 6 3 7 3 2 7 8 7 3 8 8 10 6 6 10 [51] 5 7 3 7 6 9 6 7 9 5 3 8 5 8 5 10 3 9 5 10 7 6 5 9 4 [76] 8 10 6 6 8 6 5 10 7 3 9 4 5 10 5 10 3 2 5 8 3 3 5 9 9 [101] 6 5 8 9 9 6 5 3 6 8 3 4 3 9 10 9 7 2 9 10 2 10 10 8 4 [126] 9 9 5 7 2 4 8 7 8 8 3 9 3 7 5 8 3 8 5 9 4 8 8 10 2 [151] 4 3 10 5 4 4 6 6 3 7 6 6 6 9 3 2 6 2 3 2 4 2 7 5 3 [176] 4 3 9 4 2 7 9 7 10 8 8 2 6 3 4 9 6 10 6 2 3 9 5 9 7
Example
> union(x3,y4)
Output
[1] 1 7 5 9 2 6 8 0 4 3 10
Example
> x5<-round(runif(200,0,20)) > x5
Output
[1] 1 20 11 4 19 5 8 19 0 14 1 5 1 3 8 18 2 9 0 12 1 15 7 15 4 [26] 18 6 6 2 18 0 18 11 18 7 6 14 15 8 7 0 18 12 15 7 20 2 10 13 5 [51] 14 19 1 17 7 18 12 9 3 10 3 8 2 1 15 7 4 14 0 15 5 8 12 9 16 [76] 12 9 16 5 10 7 14 17 16 9 10 16 9 14 5 17 8 8 2 18 1 18 14 3 2 [101] 6 7 9 19 20 13 1 9 9 16 4 5 1 1 16 2 8 10 5 4 15 6 11 6 18 [126] 17 7 0 15 13 16 13 19 2 19 16 18 9 13 20 3 4 3 18 1 8 13 19 6 7 [151] 8 18 13 12 11 18 18 11 12 7 1 12 2 17 15 6 13 11 13 2 12 10 7 5 15 [176] 18 8 2 17 4 1 8 17 15 12 2 4 9 13 0 13 12 3 3 11 4 15 5 1 5
Example
> y5<-round(runif(200,18,30)) > y5
Output
[1] 23 18 24 29 20 22 22 23 28 26 23 28 27 22 19 25 23 27 28 27 23 25 29 19 25 [26] 25 27 27 24 30 24 20 29 27 27 27 19 18 21 23 19 19 27 27 22 25 27 19 28 23 [51] 27 25 24 24 19 21 19 24 30 21 26 19 20 24 30 23 19 25 19 29 23 25 21 20 25 [76] 29 22 29 19 19 24 24 29 23 27 22 25 20 26 23 24 30 28 19 26 22 24 19 19 24 [101] 28 24 24 26 29 26 29 22 22 21 24 30 27 25 28 21 22 21 28 23 25 23 20 22 23 [126] 25 21 20 24 26 18 29 25 18 19 21 18 18 28 30 22 30 26 28 19 27 20 26 21 20 [151] 18 25 21 20 26 30 25 22 22 22 22 25 23 19 22 25 27 25 19 19 29 19 24 30 18 [176] 26 20 19 24 20 25 20 27 28 28 20 26 20 28 21 29 25 25 25 20 24 28 30 23 20
Example
> union(x5,y5)
Output
[1] 1 20 11 4 19 5 8 0 14 3 18 2 9 12 15 7 6 10 13 17 16 23 24 29 22 [26] 28 26 27 25 30 21
- Related Articles
- How to find the union of three vectors in R?
- How to find the covariance between two vectors in R?
- How to find the number of common words between two string vectors in R?
- How to find different elements between two string vectors in R?
- How to find the cross product of two vectors in R by adding the elements?
- How to Find the Union of Two Arrays in Java?
- How to concatenate two or more vectors in R?
- How to multiply two vectors in R as in mathematics?
- How to match two string vectors if the strings case is different in both the vectors in R?
- How to find the common elements in multiple vectors in R?
- How to find the unique elements in multiple vectors in R?
- How to combine two factor vectors to create one in R?
- How to check if two vectors are exactly same in R?
- How to find pairwise maximum among multiple vectors in R?
- How to combine array of vectors in R?

Advertisements