A possible solution

Introduction

Note that the setup chunk above is not visible in the final document since the chunk option include=FALSE. In this setup chunk we set the default value for the option echo to FALSE, meaning that code is hidden by default.

Also check out the header, in which we explicitly set title, date, and author - the result of this can be seen in the rendered document. To comply with the respective tasks we added the specifications toc: true and toc_float: true to the html_document to add the floating table of contents, and code_download: true to add the code download button. To the pdf_document call we only added toc: true to get the table of contents.

A second level heading

Again some text. Here is the first chunk. The code is shown in the rendered document because we set the chunk option echo=TRUE, and so is the output produced by the code because the chunk option include is set the TRUE by default:

vector_random_numbers <- rnorm(
  n = 12, mean = 5, sd = 2)
vector_random_numbers

##  [1] 5.9408644 1.4956974 7.4589696 3.7737553 4.6029126 1.5734073 4.4312455
##  [8] 0.6578314 2.5239020 1.5425166 5.9722831 4.4491438

A visualization

Here we produce the desired ggplot (the code for which remains hidden because we did not deviate from the default value of echo, which we set to FALSE in the setup chunk.)

Using Netlify Drop

The document was published using Netlify Drop, as explained in the slides. This is the reason the file is called index.Rmd: Netlify Drop only works if a html-file called index.html is included in the uploaded directory.