Why reproducible reports matter in R Programming - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to load the knitr package for reproducible reports.

R Programming

library([1])

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

Aknitr

Bdplyr

Cggplot2

Dshiny

Attempts:

3 left

💡 Hint

Common Mistakes

Loading unrelated packages like ggplot2 or shiny instead of knitr.

The knitr package is used to create reproducible reports in R.

2fill in blank

medium

Complete the code to create a reproducible report using R Markdown.

R Programming

rmarkdown::render('[1].Rmd')

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Aanalysis

Bscript

Cdata

Dreport

Attempts:

3 left

💡 Hint

Common Mistakes

Using file names without the '.Rmd' extension or unrelated names.

The file name for the R Markdown report is usually descriptive, here 'report.Rmd'.

3fill in blank

hard

Fix the error in the code to include code chunks in R Markdown.

R Programming

```{r [1]
summary(cars)
```

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Aecho=FALSE

Beval=TRUE

Csetup

Dinclude=TRUE

Attempts:

3 left

💡 Hint

Common Mistakes

Using chunk options instead of a chunk label in the curly braces.

The chunk label 'setup' is used to name the code chunk in R Markdown.

4fill in blank

hard

Fill both blanks to create a reproducible report that includes a plot and hides code.

R Programming

```{r [1], [2]=FALSE}
plot(cars)
```

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Aplot_chunk

Becho

Ceval

Dmessage

Attempts:

3 left

💡 Hint

Common Mistakes

Using options as chunk names or forgetting to hide code properly.

The chunk is named 'plot_chunk' and the code is hidden by setting echo=FALSE.

5fill in blank

hard

Fill all three blanks to create a reproducible report that filters data, summarizes it, and prints the result.

R Programming

library(dplyr)
result <- mtcars %>% filter([1] > 20) %>% summarize([2] = mean([3]))
print(result)

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Ahp

Bavg_mpg

Cmpg

Dcyl

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up column names or summary names.

The code filters cars with more than 20 horsepower, then calculates the average mpg and stores it as avg_mpg.