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 Write to a File

Example 1: Write a Sentence to txt File in R


              
sentence1 <- "Data Science is fun"

# use writeLines() to write to txt file
writeLines(sentence1, "file1.txt")

In the above example, we have used the writeLines() function to write the string named sentence1 to a txt file. Notice the arguments passed inside writeLines(),


              
writeLines(sentence1, "file1.txt")

Here,

sentence1 - name of the string we want to export
file1.txt - name of the txt file

Our file1.txt would look like this:

Note: If the file is in some other location, we have to specify the path along with the file name as: writeLines("D:/folder1/file1.txt").

Example 2: Write Into CSV File in R


              
# Create a data frame
dataframe1 <- data.frame (
  Name = c("Juan", "Alcaraz", "Simantha"),
  Age = c(22, 15, 19),
  Vote = c(TRUE, FALSE, TRUE))

# write dataframe1 into file1 csv file
write.csv(dataframe1, "file1.csv")

In the above example, we have used the write.csv() function to export a dataframe named dataframe1 to a CSV file. Notice the arguments passed inside write.csv(),


              
write.csv(dataframe1, "file1.csv")

Here,

dataframe1 - name of the data frame we want to export
file1.csv - name of the csv file

Finally, the file1.csv file would look like this in our directory: