Move rmd example into man/examples

README.Rmd

@@ -41,7 +41,7 @@ The above quiz is created from the R Markdown document below. Knitting the docum
 
 ```{r, echo = FALSE, results="asis"}
 cat("````\n")
-cat(readLines("inst/examples/draw-scatterplots.Rmd"), sep = "\n")
+cat(readLines("man/examples/draw-scatterplots.Rmd"), sep = "\n")
 cat("````")
 ```
 

man/examples/draw-scatterplots.Rmd

@@ -0,0 +1,59 @@
+---
+title: Drawing a scatterplot
+output: 
+  moodlequiz::moodlequiz:
+    replicates: 5
+moodlequiz:
+  category: datavis-scatterplots
+---
+
+# Data
+
+```{r setup, include = FALSE}
+library(tidyverse)
+library(rlang)
+library(moodlequiz)
+knitr::opts_chunk$set(echo = FALSE,
+                      results = "hide",
+                      fig.height = 4, 
+                      fig.width = 5,
+                      fig.path = "",
+                      fig.cap = "",
+                      fig.align = "center")
+```
+
+```{r data}
+cols <- colnames(mtcars)
+cats <- c("cyl", "vs", "am", "gear", "carb")
+nums <- setdiff(cols, cats)
+x <- sample(nums, 1)
+y <- sample(setdiff(nums, x), 1)
+color <- sample(cats, 1)
+size <- sample(setdiff(nums, c(x, y)), 1)
+```
+
+You have been asked to analyse the `mtcars` data. The variables and the class types of the data is shown below.
+
+```{r, echo = TRUE, results = "show"}
+str(mtcars)
+```
+
+# Plot
+
+As a starting point, you decide to draw a scatter plot for some variables. Complete the code below to get the target plot below:
+
+```r
+ggplot(mtcars, aes(x = `r cloze(x, cols)`, 
+                   y = `r cloze(y, cols)`,
+                   color = factor(`r cloze(color, cols)`),
+                   size = `r cloze(size, cols)`)) +
+    `r cloze("geom_point", ls(envir = as.environment("package:ggplot2"), pattern = "^geom_"))`()
+```
+
+
+```{r, results = "show"}
+ggplot(mtcars, aes(!!sym(x), !!sym(y), size = !!sym(size), color = factor(!!sym(color)))) + 
+  geom_point() +
+  theme(plot.background = element_rect(color = "black"))
+```
+