Course

Additional

Find the Statistical Mode Write to a File Format Decimal Places

Data Frames

Convert a List to a Dataframe Create an Empty Dataframe Combine Two Dataframe into One Change Column Name of a Dataframe Extract Columns From a Dataframe Drop Columns in a Dataframe Reorder Columns in a Dataframe Split Dataframe Merge Multiple Dataframes Delete Rows From Dataframe Make a List of Dataframes

Introduction

"Hello World" Program Add Two Vectors Find Sum, Mean and Product of Vector in R Programming Take Input From User Generate Random Number from Standard Distributions Sample from a Population Find Minimum and Maximum Sort a Vector

Strings

Concatenate Two Strings Find the Length of a String Check if Characters are Present in a String Extract n Characters From a String Replace Characters in a String Compare two Strings Convert Factors to Characters Trim Leading and Trailing Whitespaces

Vectors

Concatenate a Vector of Strings Check if a Vector Contains the Given Element Count the Number of Elements in a Vector Find Index of an Element in a Vector Access Values in a Vector Add Leading Zeros to Vector

Decision and Loops

Find the Factorial of a Number R Multiplication Table Check Prime Number check Armstrong Number Print the Fibonacci Sequence Check for Leap Year Check if a Number is Odd or Even in R Programming Check if a Number is Positive, Negative or Zero Find the Sum of Natural Numbers

Functions

Convert Decimal into Binary using Recursion in R Find the Factorial of a Number Using Recursion Find the Factors of a Number Fibonacci Sequence Using Recursion in R Find H.C.F. or G.C.D.Find L.C.M.Make a Simple Calculator Sum of Natural Numbers Using Recursion

R Program to Delete Rows From Dataframe

Example 1: Delete Single Row of Dataframe in R


              
# Create a data frame
dataframe1 <- data.frame (
  Name = c("Juan", "Alcaraz", "Simantha"),
  Age = c(22, 15, 19),
  Address = c("Nepal", "USA", "Germany")
)

# delete 1st row
print(dataframe1[-1, ])

# extract 1st and 3rd row
print(dataframe1[-c(1,3), ])

Output


              
     Name Age Address
2  Alcaraz  15     USA
3 Simantha  19 Germany

In the above example, we have created a dataframe named dataframe1. And we have deleted a row using the index value and - sign.

Here, dataframe1[-1, ] deletes entire elements of 1st row

Example 2: Split Dataframe by Column Names in R


              
# Create a data frame
dataframe1 <- data.frame (
  Name = c("Juan", "Alcaraz", "Simantha"),
  Age = c(22, 15, 19),
  Address = c("Nepal", "USA", "Germany")
)

# delete 1st and 3rd row
print(dataframe1[-c(1,3), ])

Output


              
     Name Age Address
2 Alcaraz  15     USA

Here, dataframe1[-c(1,3), ] deletes entire elements of 1st and 3rd row.