1806 ch4 ex

materials/_no-render/template.qmd

@@ -55,14 +55,18 @@ exec(open('setup-files/setup.py').read())
 Description
 
 ::: {.callout-answer collapse=true}
-## Answer
 
 ::: {.panel-tabset group="language"}
 ## R
 :::
 :::
 :::
 
+:::{.callout-important}
+Complete [Exercise -@sec-exr_title].
+:::
+
+
 ## Key points
 
 ::: {.callout-note}

materials/data-wrangling.qmd

@@ -262,6 +262,7 @@ This gives us a 'wide' table, where the original data are split by the type of `
 Deciding which format to use can sometimes feel a bit tricky. Relating it to plotting can be helpful. Ask yourself the question: "what is going on the x and y axis?". Each variable that you want to plot on either the x or y axis needs to be in its own column.
 
 :::
+
 ## Exporting data
 
 It can be useful to save data sets you create throughout your analysis.

materials/intro-to-programming.qmd

@@ -139,6 +139,10 @@ because it will fail on someone else's computer.
 
 :::
 
+:::{.callout-important}
+Complete [Exercise -@sec-exr_project].
+:::
+
 ## Writing code
 
 ::: {.panel-tabset group="language"}
@@ -163,6 +167,10 @@ command you can hit <kbd>Esc</kbd> and RStudio will give you back the `>` prompt
 
 :::
 
+:::{.callout-important}
+Complete [Exercise -@sec-exr_calculations].
+:::
+
 ## Creating scripts
 
 ::: {.panel-tabset group="language"}
@@ -184,6 +192,10 @@ by pressing the shortcut <kbd>Ctrl</kbd>+<kbd>Enter</kbd>.
 
 :::
 
+:::{.callout-important}
+Complete [Exercise -@sec-exr_scripts].
+:::
+
 ## Installing and loading packages
 
 ::: {.panel-tabset group="language"}
@@ -213,6 +225,115 @@ library(tidyverse)
 
 :::
 
+:::{.callout-important}
+Complete [Exercise -@sec-exr_packages].
+:::
+
+:::{.callout-important}
+Remember, we only need to **install** a library/package *once*. However, we need to **load** it every time we start an analysis.
+:::
+
+
+
+## Exercises
+
+### Setting up a project {#sec-exr_project}
+
+:::{.callout-exercise}
+
+{{< level 1 >}}
+
+Set up a project and make sure it's set as your working directory.
+
+:::
+
+### Calculations {#sec-exr_calculations}
+
+:::{.callout-exercise}
+
+{{< level 1 >}}
+
+Run the following calculations:
+
+* `2 + 23`
+* `23 * 4`
+* `314 - 82`
+* `(12 - 4) * (6 + 2)`
+* `3 ^ 2`
+
+::: {.callout-answer collapse=true}
+
+::: {.panel-tabset group="language"}
+## R
+
+```{r}
+2 + 23
+23 * 4
+314 - 82
+(12 - 4) * (6 + 2)
+3 ^ 2
+```
+
+:::
+:::
+:::
+
+### Creating scripts {#sec-exr_scripts}
+
+:::{.callout-exercise}
+
+{{< level 1 >}}
+
+Please do the following:
+
+1. Create a script called `session_01` in your working directory.
+2. Re-run the calculations from [Exercise -@sec-exr_calculations].
+3. Save the changes to the script.
+
+:::
+
+### Adding functionality {#sec-exr_packages}
+
+:::{.callout-exercise}
+
+{{< level 1 >}}
+
+It's important that you are comfortable with adding functionality.
+
+::: {.panel-tabset group="language"}
+## R
+
+Please install the `tidyverse` package *using the console*.
+
+Then, in the script you created in [Exercise -@sec-exr_scripts] load it into R.
+:::
+
+::: {.callout-answer collapse=true}
+
+::: {.panel-tabset group="language"}
+## R
+
+We can install the package as follows:
+
+```{r}
+#| eval: false
+install.packages("tidyverse")
+```
+
+Note that the title of the package needs to be in quotes (`" "`).
+
+We load the package by running the following line of code from our script:
+
+```{r}
+#| eval: false
+library(tidyverse)
+```
+
+Note that, rather inconsistently, we do *not* use quotes around the package name when loading it.
+:::
+:::
+:::
+
 
 ## Summary