Tutorial

Module 1 (Introduction to R)

Below are some interactive exercises to test your R knowledge. Just type your answers into the appropriate box, and hit “Run”. In some cases, there’ll be a hint or solution for you to use, but usually there’ll be more than one way to do it!

Exercise 1 (R and RStudio):

Quiz

Exercise 2 (Arithmetic Operators):

Write the R code required to add 2 plus 2:

2 + 2

Write the R code required to divide 10 by 5:

10 / 5

Exercise 3 (Variables)

Create a variable called variable_1 and assign it the value 10. Then output it to the console.

variable_1 <- 10
variable_1

Create two numeric variables (called whatever you like), and multiply them.

variable_1 <- 10
variable_2 <- 5
variable_1 * variable_2

Exercise 4 (Data Structures)

Create a named vector with 3 values. (Hint: That doesn’t mean create a variable, it means that the values in the vector should be named)

c("value_1" = 10, "value_2" = 20, "value_3" = 30)

Create a list with two values; one that’s a vector and another that’s a dataframe.

list(
  "vector" = c(1,2,3,4),
  "dataframe" = data.frame(col_1 = "hello",
                           col_2 = "world")
)

Exercise 5 (Subsetting)

Change the following code to only return the first 10 values from the vector.

vector_1 <- c(56,3,324,6,7,86,5,4,17,54,8468,45,345,234,7,56,8,4,32,234,5,764,658,6,3463)
vector_1

vector_1 <- c(56,3,324,6,7,86,5,4,17,54,8468,45,345,234,7,56,8,4,32,234,5,764,658,6,3463)
vector_1[1:10]