Showing the code in PDF can be long and distracting to some readers or clients, but I would leave it as an option in the HTML version if they want to reproduce it or verify what I've done. Depending on whom I work with, I may share one or the other (or both), but I want to avoid changing the Rmd script each time to produce them.
Thus, I want to be able to knit my R Markdown script to HTML and PDF in a way so that the HTML output can show the code (with code_folding in the output: html_document options), but prevent the code from appearing in my PDF output.
Is there a way to do that without recoding part of the script each time?
Take this example R Markdown text:
---
title: "Title"
output:
pdf_document:
df_print: kable
html_document:
code_folding: show
df_print: paged
---
```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```
## R Markdown
```{r mtcars}
# I want to make this code visible when I knit to HTML, but hidden when I knit to PDF.
# How do I do that?
mtcars[1:2, 1:4]
```
It will show the mtcars chunk when it's knitted.
I can change knitr::opts_chunk$set(echo = TRUE) to knitr::opts_chunk$set(echo = FALSE) in the setup chunk to prevent the code from showing in the PDF output, but the code will disappear in the HTML output as well.
code_folding: hide can hide the code for html_document output options and allows the reader to see the code if necessary. However, code_folding: hide does not work for pdf_document output options. Is there an alternative that I can use?
