exercise_solutions.Rmd

---
title: "Exercise Solutions"
output: 
  html_document:
    toc: false
---

```{r, include=FALSE}
library(knitr)
library(stringr)
knitr::opts_chunk$set(message=FALSE, warning=FALSE, eval=TRUE, echo=FALSE)
suppressPackageStartupMessages(library(dplyr))
suppressPackageStartupMessages(library(stringr))
source('reveal.R')
```

\  

Follow the links below for solutions to each of the exercises you have completed on this course. Click on the 'code' buttons to reveal the R code associated with each question. If you would prefer these solutions as R scripts for later offline use then you can [find these here](course_code.html).

\  

```{r, reveal, echo=FALSE, eval = isFALSE(show_text12)}
cat("solutions will be released as the course progresses")
```

```{r sol12, results='asis', eval = isTRUE(show_text12)}
file_name <- list.files('.') %>%
  sort %>% 
  grep("(exercise_[12]_solution.html)", . , value=TRUE)

link_name <- file_name %>%
  gsub("\\.html", "", .) %>%
  paste0(., "s") %>%
  gsub("_", " ", .) %>%
  str_to_sentence(.)

paste0("- [", link_name, "](", file_name, "){target='_blank'}") %>%
cat(sep="\n\n")
```


```{r sol34, results='asis', eval = isTRUE(show_text34)}
file_name <- list.files('.') %>%
  sort %>% 
  grep("(exercise_[34]_solution.html|exercise_[34]_ggplot_solution.html)", . , value=TRUE) %>%
  .[c(1,3,2)]

link_name <- file_name %>%
  gsub("\\.html", "", .) %>%
  paste0(., "s") %>%
  gsub("_", " ", .) %>%
  str_to_sentence(.)

paste0("- [", link_name, "](", file_name, "){target='_blank'}") %>%
cat(sep="\n\n")
```

```{r sol56, results='asis', eval = isTRUE(show_text56)}
file_name <- list.files('.') %>%
  sort %>% 
  grep("(exercise_[56]_solution.html)", . , value=TRUE)

link_name <- file_name %>%
  gsub("\\.html", "", .) %>%
  paste0(., "s") %>%
  gsub("_", " ", .) %>%
  str_to_sentence(.)

paste0("- [", link_name, "](", file_name, "){target='_blank'}") %>%
cat(sep="\n\n")
```

\  

[Offline R scripts](course_code.html)

```{r, include = FALSE}
# TODO: generate list automagically
knitr::purl('./exercise_1_solution.Rmd', output = './exercise_solutions/exercise_1_solution.R', quiet = TRUE)
knitr::purl('./exercise_2_solution.Rmd', output = './exercise_solutions/exercise_2_solution.R', quiet = TRUE)
knitr::purl('./exercise_3_solution.Rmd', output = './exercise_solutions/exercise_3_solution.R', quiet = TRUE)
knitr::purl('./exercise_4_solution.Rmd', output = './exercise_solutions/exercise_4_solution.R', quiet = TRUE)
knitr::purl('./exercise_4_ggplot_solution.Rmd', output = './exercise_solutions/exercise_4_ggplot_solution.R', quiet = TRUE)
knitr::purl('./exercise_5_solution.Rmd', output = './exercise_solutions/exercise_5_solution.R', quiet = TRUE)
knitr::purl('./exercise_6_solution.Rmd', output = './exercise_solutions/exercise_6_solution.R', quiet = TRUE)
```