filter() for row selection in R Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to select rows where the column 'age' is greater than 30.

R Programming

filtered_data <- filter(data, age [1] 30)

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

A>

B<

C==

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>' will select rows with age less than 30.

Using '==' will select rows with age exactly 30.

The filter() function selects rows where the condition is TRUE. To select rows with age greater than 30, use the '>' operator.

2fill in blank

medium

Complete the code to select rows where the column 'score' is equal to 100.

R Programming

perfect_scores <- filter(data, score [1] 100)

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

A>

B!=

C==

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '=' instead of '==' causes an error in filter().

Using '!=' selects rows where score is not 100.

To select rows where 'score' is exactly 100, use the equality operator '=='.

3fill in blank

hard

Fix the error in the code to select rows where 'height' is less than or equal to 170.

R Programming

short_people <- filter(data, height [1] 170)

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

A=>

B<=

C<

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using '=>' instead of '<=' causes a syntax error.

Using '<' excludes rows where height equals 170.

The correct operator for 'less than or equal to' is '<='. The operator '=>' is invalid in R.

4fill in blank

hard

Fill both blanks to select rows where 'weight' is greater than 60 and 'age' is less than 50.

R Programming

selected <- filter(data, weight [1] 60, age [2] 50)

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

A>

B<

C==

D>=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '==' instead of '>' or '<' will select only exact matches.

Using '>=' or '<=' changes the condition to include equal values.

To select rows where weight is greater than 60, use '>'. To select rows where age is less than 50, use '<'.

5fill in blank

hard

Fill all three blanks to select rows where 'score' is greater than 80, 'age' is less than 30, and 'height' equals 175.

R Programming

filtered <- filter(data, score [1] 80, age [2] 30, height [3] 175)

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

A<

B>

C==

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up operators like using '<' instead of '>' for score.

Using '=' instead of '==' for equality check.

Use '>' for score greater than 80, '<' for age less than 30, and '==' for height equal to 175.