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<h1>Split Ages into Age Groups</h1>
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<small class="dont-index">Source: <a href="https://github.com/msberends/AMR/blob/HEAD/R/age.R" class="external-link"><code>R/age.R</code></a></small>
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<div class="hidden name"><code>age_groups.Rd</code></div>
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<p>Split ages into age groups defined by the <code>split</code> argument. This allows for easier demographic (antimicrobial resistance) analysis.</p>
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<div class="sourceCode"><pre class="sourceCode r"><code><span class="fu">age_groups</span><span class="op">(</span><span class="va">x</span>, split_at <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="fl">12</span>, <span class="fl">25</span>, <span class="fl">55</span>, <span class="fl">75</span><span class="op">)</span>, na.rm <span class="op">=</span> <span class="cn">FALSE</span><span class="op">)</span></code></pre></div>
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<div id="arguments">
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<h2>Arguments</h2>
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<dl><dt>x</dt>
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<dd><p>age, e.g. calculated with <code><a href="age.html">age()</a></code></p></dd>
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<dt>split_at</dt>
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<dd><p>values to split <code>x</code> at, defaults to age groups 0-11, 12-24, 25-54, 55-74 and 75+. See <em>Details</em>.</p></dd>
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<dt>na.rm</dt>
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<dd><p>a <a href="https://rdrr.io/r/base/logical.html" class="external-link">logical</a> to indicate whether missing values should be removed</p></dd>
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</dl></div>
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<div id="value">
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<h2>Value</h2>
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<p>Ordered <a href="https://rdrr.io/r/base/factor.html" class="external-link">factor</a></p>
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</div>
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<div id="details">
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<h2>Details</h2>
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<p>To split ages, the input for the <code>split_at</code> argument can be:</p><ul><li><p>A <a href="https://rdrr.io/r/base/numeric.html" class="external-link">numeric</a> vector. A value of e.g. <code>c(10, 20)</code> will split <code>x</code> on 0-9, 10-19 and 20+. A value of only <code>50</code> will split <code>x</code> on 0-49 and 50+.
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The default is to split on young children (0-11), youth (12-24), young adults (25-54), middle-aged adults (55-74) and elderly (75+).</p></li>
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<li><p>A character:</p><ul><li><p><code>"children"</code> or <code>"kids"</code>, equivalent of: <code>c(0, 1, 2, 4, 6, 13, 18)</code>. This will split on 0, 1, 2-3, 4-5, 6-12, 13-17 and 18+.</p></li>
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<li><p><code>"elderly"</code> or <code>"seniors"</code>, equivalent of: <code>c(65, 75, 85)</code>. This will split on 0-64, 65-74, 75-84, 85+.</p></li>
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<li><p><code>"fives"</code>, equivalent of: <code>1:20 * 5</code>. This will split on 0-4, 5-9, ..., 95-99, 100+.</p></li>
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<li><p><code>"tens"</code>, equivalent of: <code>1:10 * 10</code>. This will split on 0-9, 10-19, ..., 90-99, 100+.</p></li>
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</ul></li>
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</ul></div>
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<div id="stable-lifecycle">
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<h2>Stable Lifecycle</h2>
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<p><img src="figures/lifecycle_stable.svg" style='margin-bottom:"5"'><br>
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The <a href="lifecycle.html">lifecycle</a> of this function is <strong>stable</strong>. In a stable function, major changes are unlikely. This means that the unlying code will generally evolve by adding new arguments; removing arguments or changing the meaning of existing arguments will be avoided.</p>
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<p>If the unlying code needs breaking changes, they will occur gradually. For example, an argument will be deprecated and first continue to work, but will emit a message informing you of the change. Next, typically after at least one newly released version on CRAN, the message will be transformed to an error.</p>
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<div id="read-more-on-our-website-">
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<h2>Read more on Our Website!</h2>
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<p>On our website <a href="https://msberends.github.io/AMR/">https://msberends.github.io/AMR/</a> you can find <a href="https://msberends.github.io/AMR/articles/AMR.html">a comprehensive tutorial</a> about how to conduct AMR data analysis, the <a href="https://msberends.github.io/AMR/reference/">complete documentation of all functions</a> and <a href="https://msberends.github.io/AMR/articles/WHONET.html">an example analysis using WHONET data</a>.</p>
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</div>
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<div id="see-also">
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<h2>See also</h2>
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<div class="dont-index"><p>To determine ages, based on one or more reference dates, use the <code><a href="age.html">age()</a></code> function.</p></div>
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</div>
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<div id="ref-examples">
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<h2>Examples</h2>
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<div class="sourceCode"><pre class="sourceCode r"><code><span class="va">ages</span> <span class="op"><-</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="fl">3</span>, <span class="fl">8</span>, <span class="fl">16</span>, <span class="fl">54</span>, <span class="fl">31</span>, <span class="fl">76</span>, <span class="fl">101</span>, <span class="fl">43</span>, <span class="fl">21</span><span class="op">)</span>
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<span class="co"># split into 0-49 and 50+</span>
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<span class="fu">age_groups</span><span class="op">(</span><span class="va">ages</span>, <span class="fl">50</span><span class="op">)</span>
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<span class="co"># split into 0-19, 20-49 and 50+</span>
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<span class="fu">age_groups</span><span class="op">(</span><span class="va">ages</span>, <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="fl">20</span>, <span class="fl">50</span><span class="op">)</span><span class="op">)</span>
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<span class="co"># split into groups of ten years</span>
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<span class="fu">age_groups</span><span class="op">(</span><span class="va">ages</span>, <span class="fl">1</span><span class="op">:</span><span class="fl">10</span> <span class="op">*</span> <span class="fl">10</span><span class="op">)</span>
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<span class="fu">age_groups</span><span class="op">(</span><span class="va">ages</span>, split_at <span class="op">=</span> <span class="st">"tens"</span><span class="op">)</span>
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<span class="co"># split into groups of five years</span>
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<span class="fu">age_groups</span><span class="op">(</span><span class="va">ages</span>, <span class="fl">1</span><span class="op">:</span><span class="fl">20</span> <span class="op">*</span> <span class="fl">5</span><span class="op">)</span>
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<span class="fu">age_groups</span><span class="op">(</span><span class="va">ages</span>, split_at <span class="op">=</span> <span class="st">"fives"</span><span class="op">)</span>
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<span class="co"># split specifically for children</span>
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<span class="fu">age_groups</span><span class="op">(</span><span class="va">ages</span>, <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="fl">1</span>, <span class="fl">2</span>, <span class="fl">4</span>, <span class="fl">6</span>, <span class="fl">13</span>, <span class="fl">17</span><span class="op">)</span><span class="op">)</span>
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<span class="fu">age_groups</span><span class="op">(</span><span class="va">ages</span>, <span class="st">"children"</span><span class="op">)</span>
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<span class="co"># \donttest{</span>
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<span class="co"># resistance of ciprofloxacin per age group</span>
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<span class="kw">if</span> <span class="op">(</span><span class="kw"><a href="https://rdrr.io/r/base/library.html" class="external-link">require</a></span><span class="op">(</span><span class="st"><a href="https://dplyr.tidyverse.org" class="external-link">"dplyr"</a></span><span class="op">)</span><span class="op">)</span> <span class="op">{</span>
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<span class="va">example_isolates</span> <span class="op"><a href="https://magrittr.tidyverse.org/reference/pipe.html" class="external-link">%>%</a></span>
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<span class="fu"><a href="first_isolate.html">filter_first_isolate</a></span><span class="op">(</span><span class="op">)</span> <span class="op"><a href="https://magrittr.tidyverse.org/reference/pipe.html" class="external-link">%>%</a></span>
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<span class="fu"><a href="https://dplyr.tidyverse.org/reference/filter.html" class="external-link">filter</a></span><span class="op">(</span><span class="va">mo</span> <span class="op">==</span> <span class="fu"><a href="as.mo.html">as.mo</a></span><span class="op">(</span><span class="st">"E. coli"</span><span class="op">)</span><span class="op">)</span> <span class="op"><a href="https://magrittr.tidyverse.org/reference/pipe.html" class="external-link">%>%</a></span>
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<span class="fu"><a href="https://dplyr.tidyverse.org/reference/group_by.html" class="external-link">group_by</a></span><span class="op">(</span>age_group <span class="op">=</span> <span class="fu">age_groups</span><span class="op">(</span><span class="va">age</span><span class="op">)</span><span class="op">)</span> <span class="op"><a href="https://magrittr.tidyverse.org/reference/pipe.html" class="external-link">%>%</a></span>
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<span class="fu"><a href="https://dplyr.tidyverse.org/reference/select.html" class="external-link">select</a></span><span class="op">(</span><span class="va">age_group</span>, <span class="va">CIP</span><span class="op">)</span> <span class="op"><a href="https://magrittr.tidyverse.org/reference/pipe.html" class="external-link">%>%</a></span>
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<span class="fu"><a href="ggplot_rsi.html">ggplot_rsi</a></span><span class="op">(</span>x <span class="op">=</span> <span class="st">"age_group"</span>, minimum <span class="op">=</span> <span class="fl">0</span><span class="op">)</span>
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<span class="op">}</span>
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<span class="co"># }</span>
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</code></pre></div>
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