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<h1 class="title">Appendix D — Code topics</h1>
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<p>This appendix gathers together links to parts of the book that cover various code topics in R:</p>
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<ul>
<li>Comments: <a href="resampling_method.html#nte-comments" class="quarto-xref">Note <span>2.2</span></a> and <a href="sampling_tools.html#nte-eol-comments" class="quarto-xref">Note <span>7.2</span></a>.</li>
<li>Variables: <a href="about_technology.html#sec-variables" class="quarto-xref"><span>Section 4.6</span></a>.</li>
<li>Types of values in R: <a href="sampling_tools.html#sec-types-values" class="quarto-xref"><span>Section 7.3</span></a>.</li>
<li>Strings — values containing text: <a href="sampling_tools.html#sec-intro-to-strings" class="quarto-xref"><span>Section 7.4</span></a>.</li>
<li>Randomness from your computer: <a href="resampling_method.html#sec-randomness-computer" class="quarto-xref"><span>Section 2.2</span></a>.</li>
<li>Types of brackets in R: <a href="about_technology.html#nte-bracket-types" class="quarto-xref">Note <span>4.2</span></a>.</li>
<li>vector length: <a href="resampling_with_code2.html#sec-array-length" class="quarto-xref"><span>Section 6.5</span></a>.</li>
<li>Squaring values and vectors: <a href="standard_scores.html#sec-squared-arrays" class="quarto-xref"><span>Section 16.7.1</span></a>.</li>
<li>Indexing into vectors with integers: <a href="resampling_with_code2.html#sec-array-indexing" class="quarto-xref"><span>Section 6.6</span></a>.</li>
<li>Selecting multiple elements from vectors with slicing: <a href="more_sampling_tools.html#sec-slice-indexing" class="quarto-xref"><span>Section 10.2</span></a>.</li>
<li>Introducing functions: <a href="resampling_with_code.html#sec-introducing-functions" class="quarto-xref"><span>Section 5.7</span></a>.</li>
<li>Named arguments to functions: <a href="resampling_with_code.html#sec-named-arguments" class="quarto-xref"><span>Section 5.8</span></a>.</li>
<li>Functions and methods: <span class="quarto-unresolved-ref">?nte-functions-methods</span>.</li>
<li>Ranges (continuous sequences) of integers: <a href="resampling_with_code.html#sec-ranges" class="quarto-xref"><span>Section 5.9</span></a>.</li>
<li>Advanced ranges (for example, using floating point values), using <span class="r"><code>seq</code></span>: <a href="testing_counts_1.html#nte-advanced-ranges" class="quarto-xref">Note <span>21.6</span></a>.</li>
<li>The <em>absolute</em> function (<span class="r"><code>abs</code></span>) to convert all values to positive: <a href="standard_scores.html#nte-abs-function" class="quarto-xref">Note <span>16.3</span></a>.</li>
<li>Repeating elements of a vector with <span class="r"><code>rep</code></span>: <a href="sampling_tools.html#sec-repeating" class="quarto-xref"><span>Section 7.6</span></a>}</li>
<li><code>for</code> loops: <a href="resampling_with_code2.html#sec-for-loops" class="quarto-xref"><span>Section 6.6.2</span></a>.</li>
<li><code>if</code> statements: <a href="probability_theory_1a.html#sec-if-statements" class="quarto-xref"><span>Section 8.10</span></a>.</li>
<li>Finding number of repeats using <code>tabulate</code>: <a href="probability_theory_2_compound.html#sec-bincount-tabulate" class="quarto-xref"><span>Section 11.6</span></a></li>
<li>Combining Boolean vectors with <code>&</code>: <a href="more_sampling_tools.html#sec-combine-booleans" class="quarto-xref"><span>Section 10.6</span></a></li>
<li>Testing whether all elements of a vector are the same using <span class="r"><code>all</code></span>: <a href="probability_theory_4_finite.html#nte-test-all" class="quarto-xref">Note <span>13.5</span></a></li>
<li>Plotting and histograms (and histogram bins and bin edges): <a href="probability_theory_3.html#sec-on-histograms" class="quarto-xref"><span>Section 12.15.2</span></a>.</li>
<li>Shuffling vectors with <span class="r"><code>sample</code></span>: <a href="probability_theory_1a.html#sec-shuffling" class="quarto-xref"><span>Section 8.14</span></a>.</li>
<li>Choosing values at random with <span class="r"><code>sample</code></span>: <a href="resampling_with_code.html#sec-random-choice" class="quarto-xref"><span>Section 5.10</span></a>.</li>
<li>Counting <code>TRUE</code> values with <code>sum</code>: <a href="resampling_with_code.html#sec-count-with-sum" class="quarto-xref"><span>Section 5.13</span></a>.</li>
<li>Making vectors by random resampling with <span class="r"><code>sample</code></span>: <a href="resampling_with_code.html#sec-sampling-arrays" class="quarto-xref"><span>Section 5.11</span></a>.</li>
<li>Building strings with <span class="r"><code>paste</code></span>: <a href="testing_counts_1.html#sec-building-strings" class="quarto-xref"><span>Section 21.1.1</span></a>.</li>
<li>What is an operator?: <a href="testing_counts_2.html#nte-what-is-an-operator" class="quarto-xref">Note <span>23.2</span></a>.</li>
<li>Logical operators — <em>or</em><span class="r">(<code>|</code>)</span>, <em>and</em><span class="r">(<code>&</code>)</span>: <a href="testing_counts_2.html#sec-logical-operators" class="quarto-xref"><span>Section 23.1</span></a>.</li>
<li>Concatenating vectors: <a href="probability_theory_3.html#sec-concatenate" class="quarto-xref"><span>Section 12.15.1</span></a>.</li>
<li>The Comma-Separated-Values (CSV) file format for data tables: <a href="standard_scores.html#sec-csv-format" class="quarto-xref"><span>Section 16.1.1</span></a>.</li>
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