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 Count the Number of Elements in a Vector

The length of a vector means the total number of elements present in a given vector.

In R, we can use the length() function to find the total number of elements present in a vector.

Example: Length of a Vector in R Using length()


              
# create a vector
languages <- c("R", "Swift", "Java", "Python")

# find length of languages vector
length(languages) # 4

# create another vector
numbers <- c(1,5,7,9,12,54)

# find length of numbers vector
length(numbers) # 6

Output


              
[1] 4
[1] 6

In the above example, we have used the length() function to find the length of the vector named languages and numbers respectively.

Since

languages contain 4 elements, the function 4.
numbers contain 6 elements, the function 6.

Example 2: Length of a String in R Using str_length()

In order to use the str_length() function, we first import the stringr package.


              
# import stringr package
library(stringr)

string1 <- "Programiz"

# use str_length() of stringr package to find length
result <- str_length(string1)

cat("Total length:", result)

Output


              
Total length: 9

Here, we have used the str_length() function provided by the stringr package to find the length of string1.