- 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 remove repeated numbers in sequence in R data frame column?
To remove repeated numbers in sequence in R data frame column, we can follow the below steps −
First of all, create a data frame.
Then, use diff function and subsetting with single square brackets to remove repeated numbers in sequence.
Example 1
Create the data frame
Let’s create a data frame as shown below −
x<-rpois(25,3) df<-data.frame(x) df
Output
On executing, the above script generates the below output(this output will vary on your system due to randomization) −
x 1 4 2 3 3 6 4 5 5 4 6 3 7 3 8 4 9 4 10 4 11 1 12 3 13 4 14 2 15 3 16 0 17 0 18 4 19 4 20 2 21 3 22 2 23 2 24 2 25 2
Remove repeated numbers in sequence
Using diff function and subsetting with single square brackets to remove repeated numbers in sequence from column x of data frame df −
x<-rpois(25,3) df<-data.frame(x) df$x[c(1,diff(df$x))!=0]
Output
[1] 1 3 4 6 5 2 3 4 1 5 4 3 0 1 4 3 2 7 3 4 1 3 4
Example 2
Create the data frame
Let’s create a data frame as shown below −
y<-sample(1:4,25,replace=TRUE) dat<-data.frame(y) dat
Output
On executing, the above script generates the below output(this output will vary on your system due to randomization) −
y 1 3 2 3 3 3 4 1 5 1 6 3 7 1 8 1 9 3 10 4 11 1 12 2 13 2 14 2 15 4 16 1 17 2 18 2 19 4 20 3 21 2 22 1 23 1 24 3 25 2
Remove repeated numbers in sequence
Using diff function and subsetting with single square brackets to remove repeated numbers in sequence from column y of data frame dat −
y<-sample(1:4,25,replace=TRUE) dat<-data.frame(y) dat$y[c(1,diff(dat$y))!=0]
Output
[1] 3 1 3 1 3 4 1 2 4 1 2 4 3 2 1 3 2