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<div class="slides">
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<section id="title-slide" class="quarto-title-block center">
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<h1 class="title">Data Transform</h1>
|
||
<p class="subtitle">《区域水环境污染数据分析实践》<br>Data analysis practice of regional water environment pollution</p>
|
||
|
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<div class="quarto-title-authors">
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<div class="quarto-title-author">
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<div class="quarto-title-author-name">
|
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苏命、王为东<br>中国科学院大学资源与环境学院<br>中国科学院生态环境研究中心
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</div>
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</div>
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</div>
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<p class="date">2025-03-17</p>
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</section>
|
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<section id="tidyverse风格数据分析总体流程" class="slide level2">
|
||
<h2><code>tidyverse</code>风格数据分析总体流程</h2>
|
||
|
||
<img data-src="../../image/data-science/transform.png" class="r-stretch"></section>
|
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<section id="dplyr-cheatsheet" class="slide level2">
|
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<h2><a href="../../image/cheatsheet/data-transformation.pdf">dplyr cheatsheet</a></h2>
|
||
|
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<img data-src="../../image/cheatsheet/data-transformation.svg" class="r-stretch"></section>
|
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<section id="查看数据" class="slide level2">
|
||
<h2>查看数据</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb1"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb1-1"><a></a>flights</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 336,776 × 19
|
||
year month day dep_time sched_dep_time dep_delay arr_time sched_arr_time
|
||
<int> <int> <int> <int> <int> <dbl> <int> <int>
|
||
1 2013 1 1 517 515 2 830 819
|
||
2 2013 1 1 533 529 4 850 830
|
||
3 2013 1 1 542 540 2 923 850
|
||
4 2013 1 1 544 545 -1 1004 1022
|
||
5 2013 1 1 554 600 -6 812 837
|
||
6 2013 1 1 554 558 -4 740 728
|
||
7 2013 1 1 555 600 -5 913 854
|
||
8 2013 1 1 557 600 -3 709 723
|
||
9 2013 1 1 557 600 -3 838 846
|
||
10 2013 1 1 558 600 -2 753 745
|
||
# ℹ 336,766 more rows
|
||
# ℹ 11 more variables: arr_delay <dbl>, carrier <chr>, flight <int>,
|
||
# tailnum <chr>, origin <chr>, dest <chr>, air_time <dbl>, distance <dbl>,
|
||
# hour <dbl>, minute <dbl>, time_hour <dttm></code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="选择列" class="slide level2">
|
||
<h2>选择列</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb3"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb3-1"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb3-2"><a></a> <span class="fu">select</span>(year, month, day)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
</div>
|
||
</section>
|
||
<section id="选择列-1" class="slide level2">
|
||
<h2>选择列</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb4"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb4-1"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb4-2"><a></a> <span class="fu">select</span>(year<span class="sc">:</span>day)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
</div>
|
||
</section>
|
||
<section id="选择列-2" class="slide level2">
|
||
<h2>选择列</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb5"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb5-1"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb5-2"><a></a><span class="fu">select</span>(<span class="dv">3</span><span class="sc">:</span><span class="dv">5</span>)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 336,776 × 3
|
||
day dep_time sched_dep_time
|
||
<int> <int> <int>
|
||
1 1 517 515
|
||
2 1 533 529
|
||
3 1 542 540
|
||
4 1 544 545
|
||
5 1 554 600
|
||
6 1 554 558
|
||
7 1 555 600
|
||
8 1 557 600
|
||
9 1 557 600
|
||
10 1 558 600
|
||
# ℹ 336,766 more rows</code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="选择列-3" class="slide level2">
|
||
<h2>选择列</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb7"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb7-1"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb7-2"><a></a> <span class="fu">select</span>(<span class="sc">!</span>year<span class="sc">:</span>day)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 336,776 × 16
|
||
dep_time sched_dep_time dep_delay arr_time sched_arr_time arr_delay carrier
|
||
<int> <int> <dbl> <int> <int> <dbl> <chr>
|
||
1 517 515 2 830 819 11 UA
|
||
2 533 529 4 850 830 20 UA
|
||
3 542 540 2 923 850 33 AA
|
||
4 544 545 -1 1004 1022 -18 B6
|
||
5 554 600 -6 812 837 -25 DL
|
||
6 554 558 -4 740 728 12 UA
|
||
7 555 600 -5 913 854 19 B6
|
||
8 557 600 -3 709 723 -14 EV
|
||
9 557 600 -3 838 846 -8 B6
|
||
10 558 600 -2 753 745 8 AA
|
||
# ℹ 336,766 more rows
|
||
# ℹ 9 more variables: flight <int>, tailnum <chr>, origin <chr>, dest <chr>,
|
||
# air_time <dbl>, distance <dbl>, hour <dbl>, minute <dbl>, time_hour <dttm></code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="选择列-4" class="slide level2">
|
||
<h2>选择列</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb9"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb9-1"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb9-2"><a></a> <span class="fu">select</span>(<span class="sc">-</span>(year<span class="sc">:</span>day))</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 336,776 × 16
|
||
dep_time sched_dep_time dep_delay arr_time sched_arr_time arr_delay carrier
|
||
<int> <int> <dbl> <int> <int> <dbl> <chr>
|
||
1 517 515 2 830 819 11 UA
|
||
2 533 529 4 850 830 20 UA
|
||
3 542 540 2 923 850 33 AA
|
||
4 544 545 -1 1004 1022 -18 B6
|
||
5 554 600 -6 812 837 -25 DL
|
||
6 554 558 -4 740 728 12 UA
|
||
7 555 600 -5 913 854 19 B6
|
||
8 557 600 -3 709 723 -14 EV
|
||
9 557 600 -3 838 846 -8 B6
|
||
10 558 600 -2 753 745 8 AA
|
||
# ℹ 336,766 more rows
|
||
# ℹ 9 more variables: flight <int>, tailnum <chr>, origin <chr>, dest <chr>,
|
||
# air_time <dbl>, distance <dbl>, hour <dbl>, minute <dbl>, time_hour <dttm></code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="选择列-5" class="slide level2">
|
||
<h2>选择列</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb11"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb11-1"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb11-2"><a></a> <span class="fu">select</span>(<span class="fu">where</span>(is.character))</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 336,776 × 4
|
||
carrier tailnum origin dest
|
||
<chr> <chr> <chr> <chr>
|
||
1 UA N14228 EWR IAH
|
||
2 UA N24211 LGA IAH
|
||
3 AA N619AA JFK MIA
|
||
4 B6 N804JB JFK BQN
|
||
5 DL N668DN LGA ATL
|
||
6 UA N39463 EWR ORD
|
||
7 B6 N516JB EWR FLL
|
||
8 EV N829AS LGA IAD
|
||
9 B6 N593JB JFK MCO
|
||
10 AA N3ALAA LGA ORD
|
||
# ℹ 336,766 more rows</code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="选择列-6" class="slide level2">
|
||
<h2>选择列</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb13"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb13-1"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb13-2"><a></a> <span class="fu">select</span>(<span class="sc">!</span><span class="fu">where</span>(is.character)) <span class="sc">|></span></span>
|
||
<span id="cb13-3"><a></a> <span class="fu">select</span>(<span class="fu">contains</span>(<span class="st">"_"</span>))</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 336,776 × 8
|
||
dep_time sched_dep_time dep_delay arr_time sched_arr_time arr_delay air_time
|
||
<int> <int> <dbl> <int> <int> <dbl> <dbl>
|
||
1 517 515 2 830 819 11 227
|
||
2 533 529 4 850 830 20 227
|
||
3 542 540 2 923 850 33 160
|
||
4 544 545 -1 1004 1022 -18 183
|
||
5 554 600 -6 812 837 -25 116
|
||
6 554 558 -4 740 728 12 150
|
||
7 555 600 -5 913 854 19 158
|
||
8 557 600 -3 709 723 -14 53
|
||
9 557 600 -3 838 846 -8 140
|
||
10 558 600 -2 753 745 8 138
|
||
# ℹ 336,766 more rows
|
||
# ℹ 1 more variable: time_hour <dttm></code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="选择列-7" class="slide level2">
|
||
<h2>选择列</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb15"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb15-1"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb15-2"><a></a> <span class="fu">select</span>(<span class="at">tail_num =</span> tailnum)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 336,776 × 1
|
||
tail_num
|
||
<chr>
|
||
1 N14228
|
||
2 N24211
|
||
3 N619AA
|
||
4 N804JB
|
||
5 N668DN
|
||
6 N39463
|
||
7 N516JB
|
||
8 N829AS
|
||
9 N593JB
|
||
10 N3ALAA
|
||
# ℹ 336,766 more rows</code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="选择列-8" class="slide level2">
|
||
<h2>选择列</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb17"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb17-1"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb17-2"><a></a> <span class="fu">select</span>(air_time, <span class="fu">everything</span>())</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 336,776 × 19
|
||
air_time year month day dep_time sched_dep_time dep_delay arr_time
|
||
<dbl> <int> <int> <int> <int> <int> <dbl> <int>
|
||
1 227 2013 1 1 517 515 2 830
|
||
2 227 2013 1 1 533 529 4 850
|
||
3 160 2013 1 1 542 540 2 923
|
||
4 183 2013 1 1 544 545 -1 1004
|
||
5 116 2013 1 1 554 600 -6 812
|
||
6 150 2013 1 1 554 558 -4 740
|
||
7 158 2013 1 1 555 600 -5 913
|
||
8 53 2013 1 1 557 600 -3 709
|
||
9 140 2013 1 1 557 600 -3 838
|
||
10 138 2013 1 1 558 600 -2 753
|
||
# ℹ 336,766 more rows
|
||
# ℹ 11 more variables: sched_arr_time <int>, arr_delay <dbl>, carrier <chr>,
|
||
# flight <int>, tailnum <chr>, origin <chr>, dest <chr>, distance <dbl>,
|
||
# hour <dbl>, minute <dbl>, time_hour <dttm></code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="重命名" class="slide level2">
|
||
<h2>重命名</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb19"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb19-1"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb19-2"><a></a> <span class="fu">rename</span>(<span class="at">tail_num =</span> tailnum)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 336,776 × 19
|
||
year month day dep_time sched_dep_time dep_delay arr_time sched_arr_time
|
||
<int> <int> <int> <int> <int> <dbl> <int> <int>
|
||
1 2013 1 1 517 515 2 830 819
|
||
2 2013 1 1 533 529 4 850 830
|
||
3 2013 1 1 542 540 2 923 850
|
||
4 2013 1 1 544 545 -1 1004 1022
|
||
5 2013 1 1 554 600 -6 812 837
|
||
6 2013 1 1 554 558 -4 740 728
|
||
7 2013 1 1 555 600 -5 913 854
|
||
8 2013 1 1 557 600 -3 709 723
|
||
9 2013 1 1 557 600 -3 838 846
|
||
10 2013 1 1 558 600 -2 753 745
|
||
# ℹ 336,766 more rows
|
||
# ℹ 11 more variables: arr_delay <dbl>, carrier <chr>, flight <int>,
|
||
# tail_num <chr>, origin <chr>, dest <chr>, air_time <dbl>, distance <dbl>,
|
||
# hour <dbl>, minute <dbl>, time_hour <dttm></code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="重命名-1" class="slide level2">
|
||
<h2>重命名</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb21"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb21-1"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb21-2"><a></a> <span class="fu">rename</span>(年份 <span class="ot">=</span> <span class="dv">1</span>) <span class="sc">|></span></span>
|
||
<span id="cb21-3"><a></a> <span class="fu">rename</span>(月份 <span class="ot">=</span> <span class="dv">2</span>)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 336,776 × 19
|
||
年份 月份 day dep_time sched_dep_time dep_delay arr_time sched_arr_time
|
||
<int> <int> <int> <int> <int> <dbl> <int> <int>
|
||
1 2013 1 1 517 515 2 830 819
|
||
2 2013 1 1 533 529 4 850 830
|
||
3 2013 1 1 542 540 2 923 850
|
||
4 2013 1 1 544 545 -1 1004 1022
|
||
5 2013 1 1 554 600 -6 812 837
|
||
6 2013 1 1 554 558 -4 740 728
|
||
7 2013 1 1 555 600 -5 913 854
|
||
8 2013 1 1 557 600 -3 709 723
|
||
9 2013 1 1 557 600 -3 838 846
|
||
10 2013 1 1 558 600 -2 753 745
|
||
# ℹ 336,766 more rows
|
||
# ℹ 11 more variables: arr_delay <dbl>, carrier <chr>, flight <int>,
|
||
# tailnum <chr>, origin <chr>, dest <chr>, air_time <dbl>, distance <dbl>,
|
||
# hour <dbl>, minute <dbl>, time_hour <dttm></code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="重命名-2" class="slide level2">
|
||
<h2>重命名</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb23"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb23-1"><a></a>flights <span class="sc">|></span> <span class="fu">select</span>(<span class="dv">1</span><span class="sc">:</span><span class="dv">4</span>) <span class="sc">|></span> <span class="fu">head</span>(<span class="at">n =</span> <span class="dv">3</span>)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 3 × 4
|
||
year month day dep_time
|
||
<int> <int> <int> <int>
|
||
1 2013 1 1 517
|
||
2 2013 1 1 533
|
||
3 2013 1 1 542</code></pre>
|
||
</div>
|
||
<div class="sourceCode cell-code" id="cb25"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb25-1"><a></a><span class="co"># 重命名</span></span>
|
||
<span id="cb25-2"><a></a>flights <span class="sc">|></span> <span class="fu">select</span>(<span class="dv">1</span><span class="sc">:</span><span class="dv">4</span>) <span class="sc">|></span> <span class="fu">head</span>(<span class="at">n =</span> <span class="dv">3</span>) <span class="sc">|></span></span>
|
||
<span id="cb25-3"><a></a> <span class="fu">rename_all</span>(<span class="sc">~</span><span class="fu">c</span>(<span class="st">"c1"</span>, <span class="st">"c2"</span>, <span class="st">"c3"</span>, <span class="st">"c4"</span>))</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 3 × 4
|
||
c1 c2 c3 c4
|
||
<int> <int> <int> <int>
|
||
1 2013 1 1 517
|
||
2 2013 1 1 533
|
||
3 2013 1 1 542</code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="重命名-3" class="slide level2">
|
||
<h2>重命名</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb27"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb27-1"><a></a>flights <span class="sc">|></span> <span class="fu">select</span>(<span class="dv">1</span><span class="sc">:</span><span class="dv">4</span>) <span class="sc">|></span> <span class="fu">head</span>(<span class="at">n =</span> <span class="dv">3</span>)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 3 × 4
|
||
year month day dep_time
|
||
<int> <int> <int> <int>
|
||
1 2013 1 1 517
|
||
2 2013 1 1 533
|
||
3 2013 1 1 542</code></pre>
|
||
</div>
|
||
<div class="sourceCode cell-code" id="cb29"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb29-1"><a></a><span class="co"># 重命名</span></span>
|
||
<span id="cb29-2"><a></a>flights <span class="sc">|></span> <span class="fu">select</span>(<span class="dv">1</span><span class="sc">:</span><span class="dv">4</span>) <span class="sc">|></span> <span class="fu">head</span>(<span class="at">n =</span> <span class="dv">3</span>) <span class="sc">|></span></span>
|
||
<span id="cb29-3"><a></a> <span class="fu">rename_all</span>(toupper)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 3 × 4
|
||
YEAR MONTH DAY DEP_TIME
|
||
<int> <int> <int> <int>
|
||
1 2013 1 1 517
|
||
2 2013 1 1 533
|
||
3 2013 1 1 542</code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="重命名-4" class="slide level2">
|
||
<h2>重命名</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb31"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb31-1"><a></a>flights <span class="sc">|></span> <span class="fu">select</span>(<span class="dv">1</span><span class="sc">:</span><span class="dv">4</span>) <span class="sc">|></span> <span class="fu">head</span>(<span class="at">n =</span> <span class="dv">3</span>)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 3 × 4
|
||
year month day dep_time
|
||
<int> <int> <int> <int>
|
||
1 2013 1 1 517
|
||
2 2013 1 1 533
|
||
3 2013 1 1 542</code></pre>
|
||
</div>
|
||
<div class="sourceCode cell-code" id="cb33"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb33-1"><a></a><span class="co"># 重命名</span></span>
|
||
<span id="cb33-2"><a></a>flights <span class="sc">|></span> <span class="fu">select</span>(<span class="dv">1</span><span class="sc">:</span><span class="dv">4</span>) <span class="sc">|></span> <span class="fu">head</span>(<span class="at">n =</span> <span class="dv">3</span>) <span class="sc">|></span></span>
|
||
<span id="cb33-3"><a></a> <span class="fu">rename_all</span>(<span class="sc">~</span><span class="fu">paste0</span>(<span class="fu">toupper</span>(.), <span class="st">"_NEW"</span>))</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 3 × 4
|
||
YEAR_NEW MONTH_NEW DAY_NEW DEP_TIME_NEW
|
||
<int> <int> <int> <int>
|
||
1 2013 1 1 517
|
||
2 2013 1 1 533
|
||
3 2013 1 1 542</code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="练习" class="slide level2">
|
||
<h2>练习</h2>
|
||
<p>将含有下划线的列名中的下划线去掉。</p>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb35"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb35-1"><a></a>flights <span class="sc">|></span> <span class="fu">select</span>(<span class="dv">1</span><span class="sc">:</span><span class="dv">4</span>) <span class="sc">|></span> <span class="fu">head</span>(<span class="at">n =</span> <span class="dv">3</span>)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 3 × 4
|
||
year month day dep_time
|
||
<int> <int> <int> <int>
|
||
1 2013 1 1 517
|
||
2 2013 1 1 533
|
||
3 2013 1 1 542</code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="练习-1" class="slide level2">
|
||
<h2>练习</h2>
|
||
<p>将<code>airqualitydf</code>中列名的单位信息去除（前5列）。</p>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb37"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb37-1"><a></a>airqualitydf <span class="ot"><-</span> readxl<span class="sc">::</span><span class="fu">read_xlsx</span>(<span class="st">"../../data/airquality.xlsx"</span>, <span class="at">sheet =</span> <span class="dv">2</span>)</span>
|
||
<span id="cb37-2"><a></a>airqualitydf <span class="sc">|></span> <span class="fu">select</span>(<span class="dv">1</span><span class="sc">:</span><span class="dv">5</span>)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 20,088 × 5
|
||
datetime site `CO_mg/m3` `CO_24h_mg/m3` `NO2_μg/m3`
|
||
<dttm> <chr> <dbl> <dbl> <dbl>
|
||
1 2024-03-19 01:00:00 1001A 0.1 0.4 5
|
||
2 2024-03-19 01:00:00 1003A 0.2 0.4 9
|
||
3 2024-03-19 01:00:00 1004A 0.2 0.4 4
|
||
4 2024-03-19 01:00:00 1005A 0.1 0.3 6
|
||
5 2024-03-19 01:00:00 1006A 0.1 0.4 5
|
||
6 2024-03-19 01:00:00 1007A 0.3 0.5 6
|
||
7 2024-03-19 01:00:00 1008A 0.2 0.4 2
|
||
8 2024-03-19 01:00:00 1009A 0.2 0.4 2
|
||
9 2024-03-19 01:00:00 1010A 0.1 0.3 2
|
||
10 2024-03-19 01:00:00 1011A 0.2 0.4 12
|
||
# ℹ 20,078 more rows</code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="filter" class="slide level2">
|
||
<h2><code>filter</code></h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb39"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb39-1"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb39-2"><a></a> <span class="fu">filter</span>(dep_delay <span class="sc">></span> <span class="dv">120</span>)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 9,723 × 19
|
||
year month day dep_time sched_dep_time dep_delay arr_time sched_arr_time
|
||
<int> <int> <int> <int> <int> <dbl> <int> <int>
|
||
1 2013 1 1 848 1835 853 1001 1950
|
||
2 2013 1 1 957 733 144 1056 853
|
||
3 2013 1 1 1114 900 134 1447 1222
|
||
4 2013 1 1 1540 1338 122 2020 1825
|
||
5 2013 1 1 1815 1325 290 2120 1542
|
||
6 2013 1 1 1842 1422 260 1958 1535
|
||
7 2013 1 1 1856 1645 131 2212 2005
|
||
8 2013 1 1 1934 1725 129 2126 1855
|
||
9 2013 1 1 1938 1703 155 2109 1823
|
||
10 2013 1 1 1942 1705 157 2124 1830
|
||
# ℹ 9,713 more rows
|
||
# ℹ 11 more variables: arr_delay <dbl>, carrier <chr>, flight <int>,
|
||
# tailnum <chr>, origin <chr>, dest <chr>, air_time <dbl>, distance <dbl>,
|
||
# hour <dbl>, minute <dbl>, time_hour <dttm></code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="filter-练习" class="slide level2">
|
||
<h2>filter 练习</h2>
|
||
<p>Flights that departed on January 1.</p>
|
||
<div class="cell">
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 842 × 19
|
||
year month day dep_time sched_dep_time dep_delay arr_time sched_arr_time
|
||
<int> <int> <int> <int> <int> <dbl> <int> <int>
|
||
1 2013 1 1 517 515 2 830 819
|
||
2 2013 1 1 533 529 4 850 830
|
||
3 2013 1 1 542 540 2 923 850
|
||
4 2013 1 1 544 545 -1 1004 1022
|
||
5 2013 1 1 554 600 -6 812 837
|
||
6 2013 1 1 554 558 -4 740 728
|
||
7 2013 1 1 555 600 -5 913 854
|
||
8 2013 1 1 557 600 -3 709 723
|
||
9 2013 1 1 557 600 -3 838 846
|
||
10 2013 1 1 558 600 -2 753 745
|
||
# ℹ 832 more rows
|
||
# ℹ 11 more variables: arr_delay <dbl>, carrier <chr>, flight <int>,
|
||
# tailnum <chr>, origin <chr>, dest <chr>, air_time <dbl>, distance <dbl>,
|
||
# hour <dbl>, minute <dbl>, time_hour <dttm></code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="filter-练习-1" class="slide level2">
|
||
<h2>filter 练习</h2>
|
||
<p>Select flights that departed in January or February</p>
|
||
<div class="cell">
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 51,955 × 19
|
||
year month day dep_time sched_dep_time dep_delay arr_time sched_arr_time
|
||
<int> <int> <int> <int> <int> <dbl> <int> <int>
|
||
1 2013 1 1 517 515 2 830 819
|
||
2 2013 1 1 533 529 4 850 830
|
||
3 2013 1 1 542 540 2 923 850
|
||
4 2013 1 1 544 545 -1 1004 1022
|
||
5 2013 1 1 554 600 -6 812 837
|
||
6 2013 1 1 554 558 -4 740 728
|
||
7 2013 1 1 555 600 -5 913 854
|
||
8 2013 1 1 557 600 -3 709 723
|
||
9 2013 1 1 557 600 -3 838 846
|
||
10 2013 1 1 558 600 -2 753 745
|
||
# ℹ 51,945 more rows
|
||
# ℹ 11 more variables: arr_delay <dbl>, carrier <chr>, flight <int>,
|
||
# tailnum <chr>, origin <chr>, dest <chr>, air_time <dbl>, distance <dbl>,
|
||
# hour <dbl>, minute <dbl>, time_hour <dttm></code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="filter-练习-2" class="slide level2">
|
||
<h2>filter 练习</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb43"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb43-1"><a></a>jan1 <span class="ot"><-</span> flights <span class="sc">|></span> </span>
|
||
<span id="cb43-2"><a></a> <span class="fu">filter</span>(month <span class="sc">==</span> <span class="dv">1</span> <span class="sc">&</span> day <span class="sc">==</span> <span class="dv">1</span>)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
</div>
|
||
</section>
|
||
<section id="filter-1" class="slide level2">
|
||
<h2>filter</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb44"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb44-1"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb44-2"><a></a> <span class="fu">filter</span>(<span class="at">month =</span> <span class="dv">1</span>)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
</div>
|
||
</section>
|
||
<section id="filter-2" class="slide level2">
|
||
<h2>filter</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb45"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb45-1"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb45-2"><a></a> <span class="fu">filter</span>(month <span class="sc">==</span> <span class="dv">1</span> <span class="sc">|</span> <span class="dv">2</span>)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 336,776 × 19
|
||
year month day dep_time sched_dep_time dep_delay arr_time sched_arr_time
|
||
<int> <int> <int> <int> <int> <dbl> <int> <int>
|
||
1 2013 1 1 517 515 2 830 819
|
||
2 2013 1 1 533 529 4 850 830
|
||
3 2013 1 1 542 540 2 923 850
|
||
4 2013 1 1 544 545 -1 1004 1022
|
||
5 2013 1 1 554 600 -6 812 837
|
||
6 2013 1 1 554 558 -4 740 728
|
||
7 2013 1 1 555 600 -5 913 854
|
||
8 2013 1 1 557 600 -3 709 723
|
||
9 2013 1 1 557 600 -3 838 846
|
||
10 2013 1 1 558 600 -2 753 745
|
||
# ℹ 336,766 more rows
|
||
# ℹ 11 more variables: arr_delay <dbl>, carrier <chr>, flight <int>,
|
||
# tailnum <chr>, origin <chr>, dest <chr>, air_time <dbl>, distance <dbl>,
|
||
# hour <dbl>, minute <dbl>, time_hour <dttm></code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="排序" class="slide level2">
|
||
<h2>排序</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb47"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb47-1"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb47-2"><a></a> <span class="fu">arrange</span>(year, month, day, dep_time)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 336,776 × 19
|
||
year month day dep_time sched_dep_time dep_delay arr_time sched_arr_time
|
||
<int> <int> <int> <int> <int> <dbl> <int> <int>
|
||
1 2013 1 1 517 515 2 830 819
|
||
2 2013 1 1 533 529 4 850 830
|
||
3 2013 1 1 542 540 2 923 850
|
||
4 2013 1 1 544 545 -1 1004 1022
|
||
5 2013 1 1 554 600 -6 812 837
|
||
6 2013 1 1 554 558 -4 740 728
|
||
7 2013 1 1 555 600 -5 913 854
|
||
8 2013 1 1 557 600 -3 709 723
|
||
9 2013 1 1 557 600 -3 838 846
|
||
10 2013 1 1 558 600 -2 753 745
|
||
# ℹ 336,766 more rows
|
||
# ℹ 11 more variables: arr_delay <dbl>, carrier <chr>, flight <int>,
|
||
# tailnum <chr>, origin <chr>, dest <chr>, air_time <dbl>, distance <dbl>,
|
||
# hour <dbl>, minute <dbl>, time_hour <dttm></code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="排序-1" class="slide level2">
|
||
<h2>排序</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb49"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb49-1"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb49-2"><a></a> <span class="fu">arrange</span>(<span class="fu">desc</span>(dep_delay))</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 336,776 × 19
|
||
year month day dep_time sched_dep_time dep_delay arr_time sched_arr_time
|
||
<int> <int> <int> <int> <int> <dbl> <int> <int>
|
||
1 2013 1 9 641 900 1301 1242 1530
|
||
2 2013 6 15 1432 1935 1137 1607 2120
|
||
3 2013 1 10 1121 1635 1126 1239 1810
|
||
4 2013 9 20 1139 1845 1014 1457 2210
|
||
5 2013 7 22 845 1600 1005 1044 1815
|
||
6 2013 4 10 1100 1900 960 1342 2211
|
||
7 2013 3 17 2321 810 911 135 1020
|
||
8 2013 6 27 959 1900 899 1236 2226
|
||
9 2013 7 22 2257 759 898 121 1026
|
||
10 2013 12 5 756 1700 896 1058 2020
|
||
# ℹ 336,766 more rows
|
||
# ℹ 11 more variables: arr_delay <dbl>, carrier <chr>, flight <int>,
|
||
# tailnum <chr>, origin <chr>, dest <chr>, air_time <dbl>, distance <dbl>,
|
||
# hour <dbl>, minute <dbl>, time_hour <dttm></code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="slice" class="slide level2">
|
||
<h2>slice</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb51"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb51-1"><a></a>flights <span class="sc">|></span> <span class="fu">head</span>(<span class="at">n =</span> <span class="dv">5</span>)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 5 × 19
|
||
year month day dep_time sched_dep_time dep_delay arr_time sched_arr_time
|
||
<int> <int> <int> <int> <int> <dbl> <int> <int>
|
||
1 2013 1 1 517 515 2 830 819
|
||
2 2013 1 1 533 529 4 850 830
|
||
3 2013 1 1 542 540 2 923 850
|
||
4 2013 1 1 544 545 -1 1004 1022
|
||
5 2013 1 1 554 600 -6 812 837
|
||
# ℹ 11 more variables: arr_delay <dbl>, carrier <chr>, flight <int>,
|
||
# tailnum <chr>, origin <chr>, dest <chr>, air_time <dbl>, distance <dbl>,
|
||
# hour <dbl>, minute <dbl>, time_hour <dttm></code></pre>
|
||
</div>
|
||
<div class="sourceCode cell-code" id="cb53"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb53-1"><a></a>flights <span class="sc">|></span> <span class="fu">slice</span>(<span class="dv">1</span><span class="sc">:</span><span class="dv">5</span>)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 5 × 19
|
||
year month day dep_time sched_dep_time dep_delay arr_time sched_arr_time
|
||
<int> <int> <int> <int> <int> <dbl> <int> <int>
|
||
1 2013 1 1 517 515 2 830 819
|
||
2 2013 1 1 533 529 4 850 830
|
||
3 2013 1 1 542 540 2 923 850
|
||
4 2013 1 1 544 545 -1 1004 1022
|
||
5 2013 1 1 554 600 -6 812 837
|
||
# ℹ 11 more variables: arr_delay <dbl>, carrier <chr>, flight <int>,
|
||
# tailnum <chr>, origin <chr>, dest <chr>, air_time <dbl>, distance <dbl>,
|
||
# hour <dbl>, minute <dbl>, time_hour <dttm></code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="slice-1" class="slide level2">
|
||
<h2>slice</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb55"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb55-1"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb55-2"><a></a> <span class="fu">slice_max</span>(dep_delay, <span class="at">n =</span> <span class="dv">5</span>)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 5 × 19
|
||
year month day dep_time sched_dep_time dep_delay arr_time sched_arr_time
|
||
<int> <int> <int> <int> <int> <dbl> <int> <int>
|
||
1 2013 1 9 641 900 1301 1242 1530
|
||
2 2013 6 15 1432 1935 1137 1607 2120
|
||
3 2013 1 10 1121 1635 1126 1239 1810
|
||
4 2013 9 20 1139 1845 1014 1457 2210
|
||
5 2013 7 22 845 1600 1005 1044 1815
|
||
# ℹ 11 more variables: arr_delay <dbl>, carrier <chr>, flight <int>,
|
||
# tailnum <chr>, origin <chr>, dest <chr>, air_time <dbl>, distance <dbl>,
|
||
# hour <dbl>, minute <dbl>, time_hour <dttm></code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="slice-2" class="slide level2">
|
||
<h2>slice</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb57"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb57-1"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb57-2"><a></a> <span class="fu">slice_min</span>(dep_delay, <span class="at">prop =</span> <span class="fl">0.005</span>)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 2,257 × 19
|
||
year month day dep_time sched_dep_time dep_delay arr_time sched_arr_time
|
||
<int> <int> <int> <int> <int> <dbl> <int> <int>
|
||
1 2013 12 7 2040 2123 -43 40 2352
|
||
2 2013 2 3 2022 2055 -33 2240 2338
|
||
3 2013 11 10 1408 1440 -32 1549 1559
|
||
4 2013 1 11 1900 1930 -30 2233 2243
|
||
5 2013 1 29 1703 1730 -27 1947 1957
|
||
6 2013 8 9 729 755 -26 1002 955
|
||
7 2013 10 23 1907 1932 -25 2143 2143
|
||
8 2013 3 30 2030 2055 -25 2213 2250
|
||
9 2013 3 2 1431 1455 -24 1601 1631
|
||
10 2013 5 5 934 958 -24 1225 1309
|
||
# ℹ 2,247 more rows
|
||
# ℹ 11 more variables: arr_delay <dbl>, carrier <chr>, flight <int>,
|
||
# tailnum <chr>, origin <chr>, dest <chr>, air_time <dbl>, distance <dbl>,
|
||
# hour <dbl>, minute <dbl>, time_hour <dttm></code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="排序练习" class="slide level2">
|
||
<h2>排序练习</h2>
|
||
<p>根据<code>origin</code>、<code>dest</code>、<code>air_time</code>倒序排序。</p>
|
||
<div class="cell">
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 336,776 × 19
|
||
origin dest air_time year month day dep_time sched_dep_time dep_delay
|
||
<chr> <chr> <dbl> <int> <int> <int> <int> <int> <dbl>
|
||
1 EWR ALB 50 2013 5 5 1950 2000 -10
|
||
2 EWR ALB 45 2013 1 13 1721 1619 62
|
||
3 EWR ALB 43 2013 1 20 1623 1619 4
|
||
4 EWR ALB 42 2013 4 1 1439 1340 59
|
||
5 EWR ALB 41 2013 12 4 1316 1310 6
|
||
6 EWR ALB 41 2013 2 1 2034 2000 34
|
||
7 EWR ALB 41 2013 5 7 1956 2000 -4
|
||
8 EWR ALB 38 2013 1 18 1824 1619 125
|
||
9 EWR ALB 38 2013 1 28 1636 1619 17
|
||
10 EWR ALB 38 2013 11 10 2149 2159 -10
|
||
# ℹ 336,766 more rows
|
||
# ℹ 10 more variables: arr_time <int>, sched_arr_time <int>, arr_delay <dbl>,
|
||
# carrier <chr>, flight <int>, tailnum <chr>, distance <dbl>, hour <dbl>,
|
||
# minute <dbl>, time_hour <dttm></code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="去重" class="slide level2">
|
||
<h2>去重</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb60"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb60-1"><a></a><span class="co"># Remove duplicate rows, if any</span></span>
|
||
<span id="cb60-2"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb60-3"><a></a> <span class="fu">distinct</span>()</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 336,776 × 19
|
||
year month day dep_time sched_dep_time dep_delay arr_time sched_arr_time
|
||
<int> <int> <int> <int> <int> <dbl> <int> <int>
|
||
1 2013 1 1 517 515 2 830 819
|
||
2 2013 1 1 533 529 4 850 830
|
||
3 2013 1 1 542 540 2 923 850
|
||
4 2013 1 1 544 545 -1 1004 1022
|
||
5 2013 1 1 554 600 -6 812 837
|
||
6 2013 1 1 554 558 -4 740 728
|
||
7 2013 1 1 555 600 -5 913 854
|
||
8 2013 1 1 557 600 -3 709 723
|
||
9 2013 1 1 557 600 -3 838 846
|
||
10 2013 1 1 558 600 -2 753 745
|
||
# ℹ 336,766 more rows
|
||
# ℹ 11 more variables: arr_delay <dbl>, carrier <chr>, flight <int>,
|
||
# tailnum <chr>, origin <chr>, dest <chr>, air_time <dbl>, distance <dbl>,
|
||
# hour <dbl>, minute <dbl>, time_hour <dttm></code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="去重-1" class="slide level2">
|
||
<h2>去重</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb62"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb62-1"><a></a><span class="co"># Find all unique origin and destination pairs</span></span>
|
||
<span id="cb62-2"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb62-3"><a></a> <span class="fu">distinct</span>(origin, dest)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 224 × 2
|
||
origin dest
|
||
<chr> <chr>
|
||
1 EWR IAH
|
||
2 LGA IAH
|
||
3 JFK MIA
|
||
4 JFK BQN
|
||
5 LGA ATL
|
||
6 EWR ORD
|
||
7 EWR FLL
|
||
8 LGA IAD
|
||
9 JFK MCO
|
||
10 LGA ORD
|
||
# ℹ 214 more rows</code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="去重-2" class="slide level2">
|
||
<h2>去重</h2>
|
||
<div class="cell">
|
||
<div class="sourceCode cell-code" id="cb64"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb64-1"><a></a>flights <span class="sc">|></span> </span>
|
||
<span id="cb64-2"><a></a> <span class="fu">distinct</span>(origin, dest, <span class="at">.keep_all =</span> <span class="cn">TRUE</span>)</span></code><button title="复制到剪贴板" class="code-copy-button"><i class="bi"></i></button></pre></div>
|
||
<div class="cell-output cell-output-stdout">
|
||
<pre><code># A tibble: 224 × 19
|
||
year month day dep_time sched_dep_time dep_delay arr_time sched_arr_time
|
||
<int> <int> <int> <int> <int> <dbl> <int> <int>
|
||
1 2013 1 1 517 515 2 830 819
|
||
2 2013 1 1 533 529 4 850 830
|
||
3 2013 1 1 542 540 2 923 850
|
||
4 2013 1 1 544 545 -1 1004 1022
|
||
5 2013 1 1 554 600 -6 812 837
|
||
6 2013 1 1 554 558 -4 740 728
|
||
7 2013 1 1 555 600 -5 913 854
|
||
8 2013 1 1 557 600 -3 709 723
|
||
9 2013 1 1 557 600 -3 838 846
|
||
10 2013 1 1 558 600 -2 753 745
|
||
# ℹ 214 more rows
|
||
# ℹ 11 more variables: arr_delay <dbl>, carrier <chr>, flight <int>,
|
||
# tailnum <chr>, origin <chr>, dest <chr>, air_time <dbl>, distance <dbl>,
|
||
# hour <dbl>, minute <dbl>, time_hour <dttm></code></pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section id="欢迎讨论" class="slide level2 center">
|
||
<h2>欢迎讨论！</h2>
|
||
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// Inspect non-navigation links and adorn them if external
|
||
var links = window.document.querySelectorAll('a[href]:not(.nav-link):not(.navbar-brand):not(.toc-action):not(.sidebar-link):not(.sidebar-item-toggle):not(.pagination-link):not(.no-external):not([aria-hidden]):not(.dropdown-item):not(.quarto-navigation-tool):not(.about-link)');
|
||
for (var i=0; i<links.length; i++) {
|
||
const link = links[i];
|
||
if (!isInternal(link.href)) {
|
||
// undo the damage that might have been done by quarto-nav.js in the case of
|
||
// links that we want to consider external
|
||
if (link.dataset.originalHref !== undefined) {
|
||
link.href = link.dataset.originalHref;
|
||
}
|
||
}
|
||
}
|
||
function tippyHover(el, contentFn, onTriggerFn, onUntriggerFn) {
|
||
const config = {
|
||
allowHTML: true,
|
||
maxWidth: 500,
|
||
delay: 100,
|
||
arrow: false,
|
||
appendTo: function(el) {
|
||
return el.closest('section.slide') || el.parentElement;
|
||
},
|
||
interactive: true,
|
||
interactiveBorder: 10,
|
||
theme: 'light-border',
|
||
placement: 'bottom-start',
|
||
};
|
||
if (contentFn) {
|
||
config.content = contentFn;
|
||
}
|
||
if (onTriggerFn) {
|
||
config.onTrigger = onTriggerFn;
|
||
}
|
||
if (onUntriggerFn) {
|
||
config.onUntrigger = onUntriggerFn;
|
||
}
|
||
config['offset'] = [0,0];
|
||
config['maxWidth'] = 700;
|
||
window.tippy(el, config);
|
||
}
|
||
const noterefs = window.document.querySelectorAll('a[role="doc-noteref"]');
|
||
for (var i=0; i<noterefs.length; i++) {
|
||
const ref = noterefs[i];
|
||
tippyHover(ref, function() {
|
||
// use id or data attribute instead here
|
||
let href = ref.getAttribute('data-footnote-href') || ref.getAttribute('href');
|
||
try { href = new URL(href).hash; } catch {}
|
||
const id = href.replace(/^#\/?/, "");
|
||
const note = window.document.getElementById(id);
|
||
if (note) {
|
||
return note.innerHTML;
|
||
} else {
|
||
return "";
|
||
}
|
||
});
|
||
}
|
||
const findCites = (el) => {
|
||
const parentEl = el.parentElement;
|
||
if (parentEl) {
|
||
const cites = parentEl.dataset.cites;
|
||
if (cites) {
|
||
return {
|
||
el,
|
||
cites: cites.split(' ')
|
||
};
|
||
} else {
|
||
return findCites(el.parentElement)
|
||
}
|
||
} else {
|
||
return undefined;
|
||
}
|
||
};
|
||
var bibliorefs = window.document.querySelectorAll('a[role="doc-biblioref"]');
|
||
for (var i=0; i<bibliorefs.length; i++) {
|
||
const ref = bibliorefs[i];
|
||
const citeInfo = findCites(ref);
|
||
if (citeInfo) {
|
||
tippyHover(citeInfo.el, function() {
|
||
var popup = window.document.createElement('div');
|
||
citeInfo.cites.forEach(function(cite) {
|
||
var citeDiv = window.document.createElement('div');
|
||
citeDiv.classList.add('hanging-indent');
|
||
citeDiv.classList.add('csl-entry');
|
||
var biblioDiv = window.document.getElementById('ref-' + cite);
|
||
if (biblioDiv) {
|
||
citeDiv.innerHTML = biblioDiv.innerHTML;
|
||
}
|
||
popup.appendChild(citeDiv);
|
||
});
|
||
return popup.innerHTML;
|
||
});
|
||
}
|
||
}
|
||
});
|
||
</script>
|
||
|
||
|
||
</body></html> |