Line break or soft break after paste

Question

I have this dataframe:

df <- structure(list(letters = c("A", "B", "C", "D"), Number = 1:4, 
    Info = c("additionalinfo", "additionalinfo", "additionalinfo", 
    "additionalinfo")), class = "data.frame", row.names = c("1", 
"2", "3", "4"))


  letters Number           Info
1       A      1 additionalinfo
2       B      2 additionalinfo
3       C      3 additionalinfo
4       D      4 additionalinfo

I try to add a new column combining two columns with a soft break or line break:

df %>% 
  mutate(answer = paste(Number, Info, sep = " \n" ))

Desired output:

Background: Within this project Randomly take wrong answers of a quiz question from dataframe column, instead of doing by hand I want to add the answer with a soft break or line break

It should print like here in the first question. Which number has E?:

Do you want the output to print like that in R, or do you want to export it somewhere (e.g., a cdv file) where it looks like that? — DaveArmstrong, Jan 30 '22 at 13:56
@TarJae isn't the output that is showed in DonaldSeinen's post? I tried that and it seems to be working for me — akrun, Jan 30 '22 at 19:07
I just arrived now there and pasted to my script. I am exploring just now! :-) — TarJae, Jan 30 '22 at 19:09

score 2 · Answer 1 · answered Jan 30 '22 at 16:25

If you need the answer column without displaying the entire dataframe you can try

df %>% 
  mutate(answer = paste(Number, Info, sep = "\n" )) %>% 
  pull(answer) %>% 
  cat(sep = "\n")

1
additionalinfo
2
additionalinfo
3
additionalinfo
4
additionalinfo

Or, item by item

df2 <- df %>% 
  mutate(answer = paste(Number, Info, sep = "\n" ))

cat(df2$answer[1])
cat(df2$answer[2])
...
cat(df2$answer[n])

score 2 · Accepted Answer · answered Jan 30 '22 at 16:34

For shiny-rendered docs inline HTML using line break <br> could be used.

---
title: "Tutorial"
output: learnr::tutorial
runtime: shiny_prerendered
---

#```{r setup, include=FALSE}
library(learnr); library(dplyr); library(glue)
knitr::opts_chunk$set(echo = FALSE)
df <- structure(list(letters = c("A", "B", "C", "D"), Number = 1:4, 
    Info = c("additionalinfo", "additionalinfo", "additionalinfo", 
    "additionalinfo")), class = "data.frame", row.names = c("1", 
"2", "3", "4"))
df <- df %>% mutate(answer = glue("{Number}<br>{Info}"))
#```

```{r quiz}
# This works not
quiz(
 question("Which number has E?",
       answer(df[[4]][1]),
       answer(df[[4]][2]),
       answer(df[[4]][3], correct = TRUE),
       answer(df[[4]][4])         
  ),
  # This one works
  question("Which number has E?",
       answer("1"),
       answer("4"),
       answer("5", correct = TRUE),
       answer("8")
  )
 )

Bravo Donald Seinen. Works great!. – TarJae Jan 30 '22 at 19:10 — TarJae, Jan 30 '22 at 19:10

Line break or soft break after paste

2 Answers2