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 Split Dataframe

Example 1: Split Dataframe by Row Indexes in R


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

# extract 1st row
print(dataframe1[1, ])

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

Output


              
 Name Age Address
1 Juan  22   Nepal
      Name Age Address
1     Juan  22   Nepal
3 Simantha  19 Germany

Here,

dataframe1[1, ] - splits entire elements of 1st row
dataframe1[c(1,3), ] - splits entire elements of 1st and 3rd 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")
)

# extract 1st column
print(dataframe1[, "Name"])

# extract 1st and 3rd column
print(dataframe1[, c("Name", "Address")])

Output


              
[1] "Juan"     "Alcaraz"  "Simantha"
      Name Address
1     Juan   Nepal
2  Alcaraz     USA
3 Simantha Germany

Here,

dataframe1[,"Name"] - splits entire elements of 1st column
dataframe1[, c("Name","Address")] - splits entire elements of 1st and 3rd column

Note: Instead of column names we can also split data frame using column indexes as: [, 1] and [, C(1,3)]. The output will be the same.