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
Find the count of unique group combinations in an R data frame.
To find the count of unique group combinations in an R data frame, we can use count function of dplyr package along with ungroup function.
For Example, if we have a data frame called df that contains three grouping columns say G1, G2, and G3 then we can count the unique group combinations in df by using the below given command −
count(df,G1,G2,G3)%%ungroup()
Example 1
Following snippet creates a sample data frame −
Grp1<-sample(1:2,20,replace=TRUE) Grp2<-sample(1:2,20,replace=TRUE) Grp3<-sample(1:2,20,replace=TRUE) df1<-data.frame(Grp1,Grp2,Grp3) df1
The following dataframe is created
Grp1 Grp2 Grp3 1 2 1 1 2 1 2 1 3 2 1 2 4 2 2 1 5 1 1 1 6 1 1 2 7 2 1 1 8 2 1 2 9 2 1 2 10 1 1 1 11 2 1 1 12 2 1 1 13 2 2 2 14 2 1 2 15 1 2 2 16 2 2 1 17 2 1 2 18 2 2 1 19 1 1 2 20 2 2 2
To load dplyr package and count the unique group combinations in df1 on the above created data frame, add the following code to the above snippet −
Grp1<-sample(1:2,20,replace=TRUE) Grp2<-sample(1:2,20,replace=TRUE) Grp3<-sample(1:2,20,replace=TRUE) df1<-data.frame(Grp1,Grp2,Grp3) library(dplyr) count(df1,Grp1,Grp2,Grp3)%%ungroup()
Output
If you execute all the above given snippets as a single program, it generates the following Output −
Grp1 Grp2 Grp3 n 1 1 1 1 2 2 1 1 2 2 3 1 2 1 1 4 1 2 2 1 5 2 1 1 4 6 2 1 2 5 7 2 2 1 3 8 2 2 2 2
Example 2
Following snippet creates a sample data frame −
Class1<-sample(c("First","Second","Third"),20,replace=TRUE)
Class2<-sample(c("First","Second","Third"),20,replace=TRUE)
Class3<-sample(c("First","Second","Third"),20,replace=TRUE)
df2<-data.frame(Class1,Class2,Class3)
df2The following dataframe is created
Class1 Class2 Class3 1 First Second Second 2 Second Third Second 3 Third Second Third 4 First Third Second 5 Second Third First 6 Second Third First 7 First Second Second 8 Third First Third 9 Third Third Third 10 Second First Third 11 Third Second Second 12 Second Second Second 13 Third Second Second 14 Third First Third 15 First First First 16 Third Third Third 17 Third Third Third 18 First Third Third 19 Third Second First 20 Second Second Second
To count the unique group combinations in df2 on the above created data frame, add the following code to the above snippet −
Class1<-sample(c("First","Second","Third"),20,replace=TRUE)
Class2<-sample(c("First","Second","Third"),20,replace=TRUE)
Class3<-sample(c("First","Second","Third"),20,replace=TRUE)
df2<-data.frame(Class1,Class2,Class3)
count(df2,Class1,Class2,Class3)%%ungroup()Output
If you execute all the above given snippets as a single program, it generates the following Output −
Class1 Class2 Class3 n 1 First First First 1 2 First Second Second 2 3 First Third Second 1 4 First Third Third 1 5 Second First Third 1 6 Second Second Second 2 7 Second Third First 2 8 Second Third Second 1 9 Third First Third 2 10 Third Second First 1 11 Third Second Second 2 12 Third Second Third 1 13 Third Third Third 3
2K+ Views
