Essentials of the R Language (File R1 - Calculation)
1. Perform the following arithmetic operations in R:
o Add 10 and 17
o Multiply 10 by 15
o Divide 140 by 7
o Subtract 6 from 100
o Calculate 2 to the power of 5
2. Write an R script to create a sequence of numbers:
o From 1 to 100, with an interval of 5
o From 1 to 100, with an interval of 3
3. Create a variable x with a value of -100, and perform the following operations:
o Add 70 to x
o Find the absolute value of x
4. Define two variables u = 19 and v = 11, and:
o Find their sum
o Use the sum() function to add them
5. Write an R script to calculate the area of a circle where the radius is 5.
Vectors (File R2 - Vectors)
6. Create a numeric vector y with the values (10, 12, -32, 40, 50, 100), then:
o Multiply all elements by 3
o Find the absolute values of the vector
o Check the class of the vector
o Find the length, mean, maximum, and minimum of the vector
7. Create a vector z that repeats the values (1, 2, 3, 4, 5) three times.
8. Extract the 3rd and 4th elements from the vector y.
Matrices (File R3 - Matrices)
9. Create a 3x3 matrix using the values (1, 4, 7, 2, 5, 8, 3, 6, 9) and display its:
o Class
o Attributes
10. Define a matrix D with values (10, 40, 70, 20, 50, 80, 30, 60, 90) and perform the
following operations:
o Multiply all elements of D by 2 and subtract 5
o Create another matrix E and find D + E, D - E, and D * E (matrix
multiplication)
Arrays and Lists (File R4 - Arrays and Lists)
11. Create a 2D array with dimensions (2, 3, 4) and fill it with numbers from 1 to 24.
12. Create a list with the following information:
o Name: "Arun Julka"
o Age: 53
o City: "New Delhi"
o Hobbies: "reading", "coding", "painting"
Loops (File R5 - Loops)
13. Write a for loop in R that prints numbers from 1 to 5.
14. Write a while loop that starts from 6 and prints numbers up to 10.
15. Use a repeat loop to print numbers from 11 to 15 and stop the loop using break.
Factors and Data Frames (File R6 - Factors and Data Frames)
16. Create a factor from the data: ("Male", "Female", "Male", "Child", "Child",
"Male", "Female", "Female").
17. Create a data frame using the following details:
o Name: "Arun Julka", "Arvinder", "Deepak Mehra", "Sanjay Garg",
"Soma Jain"
o Age: 60, 55, 52, 56, 45
o Gender: "M", "F", "M", "M", "F"
18. Extract the first row and the third row from the data frame.
19. Extract the name column from the data frame.
Conditional and Control Flows (File R7 - Conditional Statements)
20. Write an if statement to check if a variable x = 10 is greater than 5.
21. Write an if-else statement to check whether y = 15 is greater than 15 or not.
22. Implement a for loop that prints numbers from 1 to 10 but stops when it reaches 5.
23. Implement a for loop that prints only odd numbers from 1 to 10 using the next
statement.
Importing Data from Excel (File R8 - Importing from Excel)
24. Import an Excel file named "CreditLimit.xlsx" into R and:
o Display the first 6 rows of the dataset
o Display the last 6 rows of the dataset
o Show a summary of the dataset
25. Extract and summarize the Income column from the CreditLimit dataset.
Data Visualization in R
Histograms (File R11 - Histograms)
26. Create a histogram for the Sepal.Length column in the iris dataset.
27. Create a histogram for the Petal.Length column with:
o Title: "Histogram"
o X-axis label: "Length"
o Y-axis label: "Frequency"
o Color: Red
Boxplot (File R12 - Boxplot)
28. Create a boxplot for the Sepal.Length column in the iris dataset.
29. Create a boxplot for Petal.Length with:
o Title: "Petal Length"
o X-axis label: "Species"
o Y-axis label: "Petal Length"
o Box color: Pink
o Border color: Red
Line Plot (File R13 - Line Plot)
30. Create a line plot for the vector (7, 12, 28, 3, 41).
31. Modify the above plot to:
o Use both points and lines (type = "o")
o Change the color to green
o Add a title "Line Plot"
o Label the x-axis as "points" and the y-axis as "Frequency"
Scatter Plot (File R14 - Scatter Plot)
32. Create a scatter plot for Sepal.Length and Sepal.Width in the iris dataset.
33. Modify the scatter plot to:
o Use red dots
o Title: "Scatter Plot"
o X-axis label: "sepal_length"
o Y-axis label: "sepal_width"
Bar Chart (File R15 - Bar Chart)
34. Count the number of observations for each species in the iris dataset and create a bar
chart with:
o Title: "Distribution of Iris Species"
o X-axis label: "Species"
o Y-axis label: "Count"
o Colors: Blue, Green, Pink
