Method Using Index Slicing
This method is used when the analyst was aware of the row/ column numbers to extract from the main dataset and create a subset from them for easy analysis. The numbers given to those rows or columns are called Index(s).
Syntax: dataframe[rows,columns]
Example: To make a subset of the dataframe of the first five rows and the second and fourth column
R
subset_1<-student_details[c(1:5),c(2,4)]print(subset_1) |
Output:
How to select a subset of DataFrame in R
In general, when we were working on larger dataframes, we will be only interested in a small portion of it for analyzing it instead of considering all the rows and columns present in the dataframe.
Creation of Sample Dataset
Let’s create a sample dataframe of Students as follows
R
student_details < -data.frame( stud_id=c(1: 10), stud_name=c("Anu", "Abhi", "Bob", "Charan", "Chandu", "Daniel", "Girish", "Harish", "Pandit", "Suchith"), age=c(18, 19, 17, 18, 19, 15, 21, 16, 15, 17), section=c(1, 2, 1, 2, 1, 1, 2, 1, 2, 1))print(student_details) |
Output: