Output formats (HTML, PDF, Word) in R Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create an HTML report using R Markdown.

R Programming

rmarkdown::render(input = "report.Rmd", output_format = [1])

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

A"html_document"

B"pdf_document"

C"word_document"

D"md_document"

Attempts:

3 left

💡 Hint

Common Mistakes

Using "pdf_document" or "word_document" instead of "html_document".

To create an HTML report, use "html_document" as the output format in rmarkdown::render().

2fill in blank

medium

Complete the code to generate a PDF report from an R Markdown file.

R Programming

rmarkdown::render(input = "summary.Rmd", output_format = [1])

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

A"word_document"

B"pdf_document"

C"html_document"

D"github_document"

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing formats that produce HTML or Word instead of PDF.

Use "pdf_document" to create a PDF report with rmarkdown::render().

3fill in blank

hard

Fix the error in the code to produce a Word document from R Markdown.

R Programming

rmarkdown::render(input = "doc.Rmd", output_format = [1])

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

A"word_document"

B"pdf_document"

C"beamer_presentation"

D"html_document"

Attempts:

3 left

💡 Hint

Common Mistakes

Using PDF or HTML formats when Word output is needed.

To generate a Word document, use "word_document" as the output format.

4fill in blank

hard

Fill both blanks to create an HTML report with a custom output file name.

R Programming

rmarkdown::render(input = [1], output_file = [2], output_format = "html_document")

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

A"my_report.Rmd"

B"custom_report.html"

C"report.Rmd"

D"output.html"

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping input and output file names.

Using file names with wrong extensions.

The input should be the R Markdown file name, and output_file is the desired HTML file name.

5fill in blank

hard

Fill all three blanks to generate a PDF report with a custom output file and quiet mode enabled.

R Programming

rmarkdown::render(input = [1], output_file = [2], output_format = [3], quiet = TRUE)

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

A"analysis.Rmd"

B"final_report.pdf"

C"pdf_document"

D"html_document"

Attempts:

3 left

💡 Hint

Common Mistakes

Using HTML format or wrong file extensions for PDF output.

Use the R Markdown file as input, specify the PDF file name for output, and set the output format to "pdf_document".

Practice

1. What is the main purpose of using rmarkdown::render() in R?

easy

A. To create interactive Shiny web apps

B. To install R packages automatically

C. To run R scripts line by line in the console

D. To convert R Markdown files into output formats like HTML, PDF, or Word

Solution

1. Step 1: Understand the function purpose

   rmarkdown::render() is designed to take an R Markdown file and produce a finished document in a chosen format.

2. Step 2: Identify output formats

   This function supports output formats like HTML, PDF, and Word, converting the markdown content accordingly.

3. Final Answer:

   To convert R Markdown files into output formats like HTML, PDF, or Word -> Option D

4. Quick Check:

   rmarkdown::render() = convert to output formats [OK]

Hint: Remember: render() means 'make output file' [OK]

Common Mistakes:

• Confusing render() with package installation
• Thinking render() runs code interactively
• Mixing render() with Shiny app creation

2. Which of the following is the correct way to specify PDF output in rmarkdown::render()?

easy

A. rmarkdown::render('file.Rmd', output_format = 'pdf_document')

B. rmarkdown::render('file.Rmd', output_format = 'pdf')

C. rmarkdown::render('file.Rmd', output_format = 'PDF')

D. rmarkdown::render('file.Rmd', output_format = 'pdfOutput')

Solution

1. Step 1: Recall correct output format names

   The official output format for PDF in rmarkdown is exactly 'pdf_document'.

2. Step 2: Check case sensitivity and spelling

   Incorrect names such as 'PDF', 'pdf', or 'pdfOutput' will cause errors.

3. Final Answer:

   rmarkdown::render('file.Rmd', output_format = 'pdf_document') -> Option A

4. Quick Check:

   PDF output format = 'pdf_document' [OK]

Hint: Use exact format names like 'pdf_document' [OK]

Common Mistakes:

• Using 'pdf' instead of 'pdf_document'
• Ignoring case sensitivity
• Adding extra words like 'Output'

3. Given the code:

rmarkdown::render('report.Rmd', output_format = 'word_document')

What will be the output file type?

medium

A. A Word (.docx) file

B. A PDF file

C. An HTML file

D. An R script file

Solution

1. Step 1: Identify the output format argument

   The argument output_format = 'word_document' tells R to create a Word document.

2. Step 2: Understand the file type generated

   This produces a .docx file, which is the standard Word document format.

3. Final Answer:

   A Word (.docx) file -> Option A

4. Quick Check:

   word_document output = Word file [OK]

Hint: Match output_format to file type extension [OK]

Common Mistakes:

• Confusing word_document with HTML or PDF
• Expecting an R script output
• Not recognizing .docx as Word format

4. You try to create a PDF from R Markdown using:

rmarkdown::render('doc.Rmd', output_format = 'pdf_document')

but get an error about missing LaTeX installation. What should you do?

medium

A. Restart RStudio and try again

B. Change output_format to 'html_document'

C. Install a LaTeX distribution like TinyTeX or MiKTeX

D. Remove all code chunks from the Rmd file

Solution

1. Step 1: Understand the error cause

   PDF output requires LaTeX software to convert markdown to PDF, which is missing.

2. Step 2: Fix by installing LaTeX

   Installing a LaTeX distribution like TinyTeX or MiKTeX provides the needed tools to create PDFs.

3. Final Answer:

   Install a LaTeX distribution like TinyTeX or MiKTeX -> Option C

4. Quick Check:

   Missing LaTeX = install LaTeX [OK]

Hint: PDF needs LaTeX installed to work [OK]

Common Mistakes:

• Ignoring the LaTeX requirement
• Changing output format without fixing LaTeX
• Restarting RStudio without installing LaTeX

5. You want to create an HTML report from an R Markdown file but also include a Word version automatically in a single render call. Which approach is best?

hard

A. Set output_format = c('html_document', 'word_document') in one render call

B. Call rmarkdown::render() twice with output_format = 'html_document' and then 'word_document'

C. Use output_format = 'pdf_document' and rename the file to .html and .docx

D. Create the HTML file manually and copy-paste content into Word

Solution

1. Step 1: Understand render() output_format argument

   The output_format argument does not accept multiple formats as a vector in a single call.

2. Step 2: Use multiple render calls

   Calling rmarkdown::render() twice with different output_format values is the correct way to generate multiple output files.

3. Final Answer:

   Call rmarkdown::render() twice with output_format = 'html_document' and then 'word_document' -> Option B

4. Quick Check:

   Multiple formats require multiple render calls [OK]

Hint: Use separate render calls for each output format [OK]

Common Mistakes:

• Thinking render can't handle multiple formats at once
• Renaming files without proper conversion
• Copy-pasting instead of automated rendering