Format Text Inside R Code Chunk

Format text inside R code chunk

You are using results='asis', hence, you can simply use print() and formatting markup. If you want your text to be red, simply do:

```{r,results='asis', echo=FALSE}
print("<div class='red2'>")
rd <- sample(x=1e6:1e7, size = 10, replace = FALSE)
cat(rd, sep = "\n")
print("</div>")
```

Hope it helps.

r markdown - format text in code chunk with new lines

The trick is to use two spaces before the "\n" in a row:
So replace "\n" by " \n"

Example:

```{r, results='asis'}
text <- "this is\nsome\ntext"

mycat <- function(text){
  cat(gsub(pattern = "\n", replacement = "  \n", x = text))
}

mycat(text)
```

Result:

P.S.: This is the same here on SO (normal markdown behaviour)

If you want just a linebreak use two spaces at the end of the line you want to break

Simple question: how to add text to r chunk in rmd format?

Here is one way of getting the same output in-line and from a chunk. Probably not the most efficient coding but proves the concept.

---
title: "code inline and in chunk"
output: html_document
---

in-line

`r length(mtcars$gear)` participants  
`r length(which(mtcars$gear == 3))` male,   
`r length(which(mtcars$gear == 4))` female,  
`r length(which(mtcars$gear == 5))` other

in chunk

```{r, results='asis'}

cat(paste(length(mtcars$gear), "participants  \n"))
cat(paste(length(which(mtcars$gear == 3)), "male,  \n"))
cat(paste(length(which(mtcars$gear == 4)), "female,  \n"))
cat(paste(length(which(mtcars$gear == 5)), "other  \n"))

```

Link to image of rmarkdown html output

Option for plain text formatting of Rmarkdown chunk output?

Setting knitr::opts_chunk$set(comment = "") prevents knitr and highlight.js from formatting the chunk output as comments and therefore no comment colouring is applied.

Chunks in text Rmarkdown - Xaringan

Following the example in the "Ninja" presentation template, you can produce "raw chunks" by using the markdown formatting with some tricks:

# Test

````markdown
`r ''````{r, echo = TRUE, eval=TRUE, out.width = '50%', fig.align = 'center'}

url <- 'https://media.springernature.com/full/springer-static/\nimage/art:10.1186%2Fs13059-020-02088-y/MediaObjects/13059_2020_2088_Fig1_HTML.png'

knitr::include_graphics(url) #<<
```
````

Output:
```{r, echo = TRUE, eval=TRUE, out.width = '50%', fig.align = 'center'}

url <- 'https://media.springernature.com/full/springer-static/\nimage/art:10.1186%2Fs13059-020-02088-y/MediaObjects/13059_2020_2088_Fig1_HTML.png'

knitr::include_graphics(url) #<<
```

Line highlighting is done with #<<. For this, you need to enable the highlighting in the yaml header (again, I've taken the default from the Ninja template):

output:
  xaringan::moon_reader:
    lib_dir: libs
    nature:
      highlightStyle: github
      highlightLines: true
      countIncrementalSlides: false

Format Code As a Code Block in R Markdown

One can use backticks or indenting by 4 spaces to generate the equivalent of the HTML <code> </code> tag block. Here is an Rmd document illustrating this behavior.

---
title: "Sample Document"
author: "bigNumber"
date: "12/5/2017"
output: html_document
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```

## R Markdown

here is some example code written in R Markdown. If we want to enter a code block we use the backtick, such as `inc ~ ed + occ`. 

If we want a code block with multiple lines, indenting by 4 spaces also works

    # first line of code
    for(i in 1:100) {
       # do something here
    }

More text after the code block ends. 

...and the output. Unfortunately I have to include an image to show that it renders correctly.

output markdown in r code chunk

Why build the header markup (either in markdown or HTML) manually? Try inline R expressions or some helper functions in pander (to generate markdown programatically):

---
title: "test"
author: "johndoe"
date: "September 5, 2015"
output: html_document
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```

## `r 'This is a Heading in Code'`

```{r title, results='asis'}
library(pander)
pandoc.header("This is a Heading in Code", level = 2)
```

```{r cars, results='asis'}
summary(cars)
```

---

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