Why data loading is the first step in R Programming - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to load a CSV file into R.

R Programming

data <- read.csv([1])

Drag options to blanks, or click blank then click option'

Adata.csv

Bread.csv

Ccsv.read

D"data.csv"

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around the filename

Using incorrect function names

To load a CSV file, you must provide the filename as a string in quotes.

2fill in blank

medium

Complete the code to check the first few rows of the loaded data.

R Programming

head([1])

Drag options to blanks, or click blank then click option'

Adata

Bread.csv

Ccsv

Dfile

Attempts:

3 left

💡 Hint

Common Mistakes

Using the filename instead of the data variable

Using function names instead of variables

The head() function shows the first rows of the data frame named data.

3fill in blank

hard

Fix the error in the code to load a CSV file with headers.

R Programming

data <- read.csv("data.csv", [1] = TRUE)

Drag options to blanks, or click blank then click option'

Aheader

Bheaders

Chead

Dheader_row

Attempts:

3 left

💡 Hint

Common Mistakes

Using plural 'headers'

Using incorrect argument names

The correct argument to specify headers in read.csv is header.

4fill in blank

hard

Fill both blanks to load a CSV file and view its structure.

R Programming

data <- [1]("data.csv", header = TRUE)
str([2])

Drag options to blanks, or click blank then click option'

Aread.csv

Bdata

Cdataset

Dread.table

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong function names

Using wrong variable names

Use read.csv to load the file and str(data) to see its structure.

5fill in blank

hard

Fill all three blanks to load data, check its summary, and view the first rows.

R Programming

data <- [1]("data.csv", header = TRUE)
summary([2])
head([3])

Drag options to blanks, or click blank then click option'

Aread.csv

Bdata

Cdataset

Dread.table

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names inconsistently

Using wrong function names

Load data with read.csv, then use summary(data) and head(data) to explore it.