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Merge pull request #161 from SISBID/setup24
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updating lab to not have two headings for subsetting part 1
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@carriewright11
carriewright11 authored Aug 9, 2024
2 parents fb4228d + 2dd9c18 commit 96f9bf5
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1 change: 0 additions & 1 deletion labs/data-subsetting-lab-part1.Rmd
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Expand Up @@ -15,7 +15,6 @@ In this lab you can use the interactive console to explore but please record you
library(tidyverse)
```

# Part 1

1. Check to see if you have the `mpg` dataset [hint: it's in the `ggplot2` package].

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20 changes: 17 additions & 3 deletions lecture_notes/Data_Subsetting_Part1.Rmd
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Expand Up @@ -2,10 +2,10 @@
title: "Subsetting Data in R"
author: "Data Wrangling in R"
output:
beamer_presentation: default
ioslides_presentation:
css: styles.css
widescreen: yes
beamer_presentation: default
---

```{r, include = FALSE}
Expand Down Expand Up @@ -325,9 +325,23 @@ If you try to filter or select for a column that does not exist it will not work
Did the filter work the way you expected? Did the dimensions change?

```{r, echo = FALSE, fig.align='center'}
knitr::include_graphics("https://media.giphy.com/media/5b5OU7aUekfdSAER5I/giphy.gif")
url = "https://media.giphy.com/media/5b5OU7aUekfdSAER5I/giphy.gif"
knitr::include_graphics(url)
```
https://media.giphy.com/media/5b5OU7aUekfdSAER5I/giphy.gif
Source: https://media.giphy.com/media/5b5OU7aUekfdSAER5I/giphy.gif

## Summary

- `pull()` can help us see a vector version of our variables - we can "pull" out the data from a dataframe
- The pipe (`%>%`) can help us to do sequential steps
- `select()` makes a smaller table of just selected variables
- tidyselect functions can help us select specific columns: `contains()`, `ends_with()`, `starts_with()`
- `filter` can remove rows based on conditions
- `==` is needed to filter for rows that are "exactly equal" to a value
- `!=` does the opposite
- `%in%` enables us to do multiple `==` conditions such as `%in% c(1,2,3)`
- `|` is for or logic and `&` is for and logic when combining filter conditions together
- Always check that you filtered for what you think you did!

## Lab

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81 changes: 52 additions & 29 deletions lecture_notes/Data_Subsetting_Part1.html
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Expand Up @@ -3068,20 +3068,23 @@
});
};

if (document.readyState !== "loading" &&
document.querySelector('slides') === null) {
// if the document is done loading but our element hasn't yet appeared, defer
// loading of the deck
window.setTimeout(function() {
loadDeck(null);
}, 0);
} else {
// still loading the DOM, so wait until it's finished
document.addEventListener("DOMContentLoaded", loadDeck);
if (!window.Shiny) {
// If Shiny is loaded, the slide deck is initialized in ioslides template

if (document.readyState !== "loading" &&
document.querySelector('slides') === null) {
// if the document is done loading but our element hasn't yet appeared, defer
// loading of the deck
window.setTimeout(function() {
loadDeck(null);
}, 0);
} else {
// still loading the DOM, so wait until it's finished
document.addEventListener("DOMContentLoaded", loadDeck);
}
}



</script>

<style type="text/css">
Expand Down Expand Up @@ -3122,7 +3125,7 @@
div.hanging-indent{margin-left: 1.5em; text-indent: -1.5em;}
ul.task-list{list-style: none;}
pre > code.sourceCode { white-space: pre; position: relative; }
pre > code.sourceCode > span { display: inline-block; line-height: 1.25; }
pre > code.sourceCode > span { line-height: 1.25; }
pre > code.sourceCode > span:empty { height: 1.2em; }
.sourceCode { overflow: visible; }
code.sourceCode > span { color: inherit; text-decoration: inherit; }
Expand Down Expand Up @@ -3355,7 +3358,7 @@ <h1 data-config-title><!-- populated from slide_config.json --></h1>
8 0.26
9 0.22
10 0.23
# … with 53,930 more rows</pre>
# ℹ 53,930 more rows</pre>

</article></slide><slide class=""><hgroup><h2>Selecting multiple columns of a <code>data.frame</code>:</h2></hgroup><article id="selecting-multiple-columns-of-a-data.frame">

Expand All @@ -3376,7 +3379,7 @@ <h1 data-config-title><!-- populated from slide_config.json --></h1>
8 0.26 61.9
9 0.22 65.1
10 0.23 59.4
# … with 53,930 more rows</pre>
# ℹ 53,930 more rows</pre>

</article></slide><slide class=""><hgroup><h2>See the Select &ldquo;helpers&rdquo;</h2></hgroup><article id="see-the-select-helpers">

Expand Down Expand Up @@ -3411,7 +3414,7 @@ <h1 data-config-title><!-- populated from slide_config.json --></h1>
8 0.26 Very Good H SI1
9 0.22 Fair E VS2
10 0.23 Very Good H VS1
# … with 53,930 more rows</pre>
# ℹ 53,930 more rows</pre>

</article></slide><slide class=""><hgroup><h2>Tidyselect helpers</h2></hgroup><article id="tidyselect-helpers-1">

Expand All @@ -3432,7 +3435,7 @@ <h1 data-config-title><!-- populated from slide_config.json --></h1>
8 55 337
9 61 337
10 61 338
# … with 53,930 more rows</pre>
# ℹ 53,930 more rows</pre>

</article></slide><slide class=""><hgroup><h2>Tidyselect helpers</h2></hgroup><article id="tidyselect-helpers-2">

Expand All @@ -3459,7 +3462,7 @@ <h1 data-config-title><!-- populated from slide_config.json --></h1>
8 0.3 Good J SI1 64 55 339 4.25 4.28 2.73
9 0.23 Ideal J VS1 62.8 56 340 3.93 3.9 2.46
10 0.22 Premium F SI1 60.4 61 342 3.88 3.84 2.33
# … with 48,305 more rows</pre>
# ℹ 48,305 more rows</pre>

<p>Note, no subsetting is necessary. R &ldquo;knows&rdquo; <code>depth</code> refers to a column of <code>diamonds</code>.</p>

Expand All @@ -3482,7 +3485,7 @@ <h1 data-config-title><!-- populated from slide_config.json --></h1>
8 0.3 Good J SI1 64 55 339 4.25 4.28 2.73
9 0.23 Ideal J VS1 62.8 56 340 3.93 3.9 2.46
10 0.22 Premium F SI1 60.4 61 342 3.88 3.84 2.33
# … with 48,305 more rows</pre>
# ℹ 48,305 more rows</pre>

</article></slide><slide class=""><hgroup><h2>Subset rows of a <code>data.frame</code>:</h2></hgroup><article id="subset-rows-of-a-data.frame-2">

Expand All @@ -3503,7 +3506,7 @@ <h1 data-config-title><!-- populated from slide_config.json --></h1>
8 0.7 Very Good F VS2 60.9 61 2812 5.66 5.71 3.46
9 0.71 Good E SI1 62.8 64 2817 5.6 5.54 3.5
10 0.7 Premium E VS2 62.4 61 2818 5.66 5.63 3.52
# … with 1,694 more rows</pre>
# ℹ 1,694 more rows</pre>

</article></slide><slide class=""><hgroup><h2>Subset rows of a <code>data.frame</code>:</h2></hgroup><article id="subset-rows-of-a-data.frame-3">

Expand All @@ -3525,7 +3528,7 @@ <h1 data-config-title><!-- populated from slide_config.json --></h1>
8 1.06 Premium I SI2 61.5 57 2968 6.57 6.49 4.02
9 0.91 Premium I SI2 60.2 59 2981 6.29 6.24 3.77
10 0.9 Premium I SI2 60.6 60 3001 6.23 6.28 3.79
# … with 302 more rows</pre>
# ℹ 302 more rows</pre>

</article></slide><slide class=""><hgroup><h2>Subset rows of a <code>data.frame</code>:</h2></hgroup><article id="subset-rows-of-a-data.frame-4">

Expand All @@ -3546,7 +3549,7 @@ <h1 data-config-title><!-- populated from slide_config.json --></h1>
8 0.2 Premium E SI2 60.2 62 345 3.79 3.75 2.27
9 0.3 Ideal I SI2 62 54 348 4.31 4.34 2.68
10 0.3 Good J SI1 63.4 54 351 4.23 4.29 2.7
# … with 22,249 more rows</pre>
# ℹ 22,249 more rows</pre>

</article></slide><slide class=""><hgroup><h2>Subset rows of a <code>data.frame</code>:</h2></hgroup><article id="subset-rows-of-a-data.frame-5">

Expand All @@ -3568,7 +3571,7 @@ <h1 data-config-title><!-- populated from slide_config.json --></h1>
8 0.75 Premium E SI1 61.7 60 3024 5.84 5.8 3.59
9 0.75 Premium D SI1 59.2 58 3024 5.96 5.93 3.52
10 1.02 Premium G SI2 61.7 58 3027 6.46 6.41 3.97
# … with 3,966 more rows</pre>
# ℹ 3,966 more rows</pre>

</article></slide><slide class=""><hgroup><h2>Note about quotes and numbers</h2></hgroup><article id="note-about-quotes-and-numbers">

Expand Down Expand Up @@ -3613,7 +3616,7 @@ <h1 data-config-title><!-- populated from slide_config.json --></h1>
8 0.7 Very Good F VS2 60.9 61 2812 5.66 5.71 3.46
9 0.71 Good E SI1 62.8 64 2817 5.6 5.54 3.5
10 0.7 Premium E VS2 62.4 61 2818 5.66 5.63 3.52
# … with 1,694 more rows</pre>
# ℹ 1,694 more rows</pre>

<p>You can use either syntax.</p>

Expand All @@ -3636,7 +3639,7 @@ <h1 data-config-title><!-- populated from slide_config.json --></h1>
8 0.26 Very Good H SI1 61.9 55 337 4.07 4.11 2.53
9 0.22 Fair E VS2 65.1 61 337 3.87 3.78 2.49
10 0.23 Very Good H VS1 59.4 61 338 4 4.05 2.39
# … with 52,188 more rows</pre>
# ℹ 52,188 more rows</pre>

</article></slide><slide class=""><hgroup><h2>Subset rows of a <code>data.frame</code>:</h2></hgroup><article id="subset-rows-of-a-data.frame-9">

Expand Down Expand Up @@ -3679,7 +3682,7 @@ <h1 data-config-title><!-- populated from slide_config.json --></h1>
8 0.33 Ideal I SI2
9 0.32 Good H SI2
10 0.32 Very Good H SI2
# … with 9,184 more rows</pre>
# ℹ 9,184 more rows</pre>

</article></slide><slide class=""><hgroup><h2>Combining <code>filter</code> and <code>select</code>:</h2></hgroup><article id="combining-filter-and-select-1">

Expand Down Expand Up @@ -3718,7 +3721,7 @@ <h1 data-config-title><!-- populated from slide_config.json --></h1>
8 337 0.26 Very Good H SI1
9 337 0.22 Fair E VS2
10 338 0.23 Very Good H VS1
# … with 53,930 more rows</pre>
# ℹ 53,930 more rows</pre>

</article></slide><slide class=""><hgroup><h2>Multiple tidyselect functions</h2></hgroup><article id="multiple-tidyselect-functions">

Expand All @@ -3739,7 +3742,7 @@ <h1 data-config-title><!-- populated from slide_config.json --></h1>
8 0.26 Very Good H SI1 55 337
9 0.22 Fair E VS2 61 337
10 0.23 Very Good H VS1 61 338
# … with 53,930 more rows</pre>
# ℹ 53,930 more rows</pre>

</article></slide><slide class=""><hgroup><h2>Multiple patterns with tidyselect</h2></hgroup><article id="multiple-patterns-with-tidyselect">

Expand All @@ -3760,7 +3763,7 @@ <h1 data-config-title><!-- populated from slide_config.json --></h1>
8 0.26 Very Good H SI1 337
9 0.22 Fair E VS2 337
10 0.23 Very Good H VS1 338
# … with 53,930 more rows</pre>
# ℹ 53,930 more rows</pre>

</article></slide><slide class=""><hgroup><h2>Common error for filter or select</h2></hgroup><article id="common-error-for-filter-or-select">

Expand All @@ -3775,7 +3778,22 @@ <h1 data-config-title><!-- populated from slide_config.json --></h1>

<p>Did the filter work the way you expected? Did the dimensions change?</p>

<p><img src="https://media.giphy.com/media/5b5OU7aUekfdSAER5I/giphy.gif" style="display: block; margin: auto;" /> <a href='https://media.giphy.com/media/5b5OU7aUekfdSAER5I/giphy.gif' title=''>https://media.giphy.com/media/5b5OU7aUekfdSAER5I/giphy.gif</a></p>
<p><img src="https://media.giphy.com/media/5b5OU7aUekfdSAER5I/giphy.gif" style="display: block; margin: auto;" /> Source: <a href='https://media.giphy.com/media/5b5OU7aUekfdSAER5I/giphy.gif' title=''>https://media.giphy.com/media/5b5OU7aUekfdSAER5I/giphy.gif</a></p>

</article></slide><slide class=""><hgroup><h2>Summary</h2></hgroup><article id="summary">

<ul>
<li><code>pull()</code> can help us see a vector version of our variables - we can &ldquo;pull&rdquo; out the data from a dataframe</li>
<li>The pipe (<code>%&gt;%</code>) can help us to do sequential steps</li>
<li><code>select()</code> makes a smaller table of just selected variables</li>
<li>tidyselect functions can help us select specific columns: <code>contains()</code>, <code>ends_with()</code>, <code>starts_with()</code></li>
<li><code>filter</code> can remove rows based on conditions</li>
<li><code>==</code> is needed to filter for rows that are &ldquo;exactly equal&rdquo; to a value</li>
<li><code>!=</code> does the opposite</li>
<li><code>%in%</code> enables us to do multiple <code>==</code> conditions such as <code>%in% c(1,2,3)</code></li>
<li><code>|</code> is for or logic and <code>&amp;</code> is for and logic when combining filter conditions together</li>
<li>Always check that you filtered for what you think you did!</li>
</ul>

</article></slide><slide class=""><hgroup><h2>Lab</h2></hgroup><article id="lab">

Expand Down Expand Up @@ -3807,6 +3825,11 @@ <h1 data-config-title><!-- populated from slide_config.json --></h1>
window.jQuery(e.target).trigger('shown');
});
}
if (window.Shiny) {
// Initialize slides when this script appears on the page, since it
// indicates that the <slides> markup has been fully loaded.
window.loadDeck();
}
})();
</script>

Expand Down
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