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<!-- Generated by pkgdown: do not edit by hand --><html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"><title>Convert labelled vectors to factors while preserving attributes — as_factor • REDCapCAST</title><!-- favicons --><link rel="icon" type="image/png" sizes="16x16" href="../favicon-16x16.png"><link rel="icon" type="image/png" sizes="32x32" href="../favicon-32x32.png"><link rel="apple-touch-icon" type="image/png" sizes="180x180" href="../apple-touch-icon.png"><link rel="apple-touch-icon" type="image/png" sizes="120x120" href="../apple-touch-icon-120x120.png"><link rel="apple-touch-icon" type="image/png" sizes="76x76" href="../apple-touch-icon-76x76.png"><link rel="apple-touch-icon" type="image/png" sizes="60x60" href="../apple-touch-icon-60x60.png"><script src="../deps/jquery-3.6.0/jquery-3.6.0.min.js"></script><meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"><link href="../deps/bootstrap-5.3.1/bootstrap.min.css" rel="stylesheet"><script src="../deps/bootstrap-5.3.1/bootstrap.bundle.min.js"></script><link href="../deps/font-awesome-6.5.2/css/all.min.css" rel="stylesheet"><link href="../deps/font-awesome-6.5.2/css/v4-shims.min.css" rel="stylesheet"><script src="../deps/headroom-0.11.0/headroom.min.js"></script><script src="../deps/headroom-0.11.0/jQuery.headroom.min.js"></script><script src="../deps/bootstrap-toc-1.0.1/bootstrap-toc.min.js"></script><script src="../deps/clipboard.js-2.0.11/clipboard.min.js"></script><script src="../deps/search-1.0.0/autocomplete.jquery.min.js"></script><script src="../deps/search-1.0.0/fuse.min.js"></script><script src="../deps/search-1.0.0/mark.min.js"></script><!-- pkgdown --><script src="../pkgdown.js"></script><meta property="og:title" content="Convert labelled vectors to factors while preserving attributes — as_factor"><meta name="description" content='This extends [forcats::as_factor()] as well as [haven::as_factor()], by appending
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original attributes except for "class" after converting to factor to avoid
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ta loss in case of rich formatted and labelled data.'><meta property="og:description" content='This extends [forcats::as_factor()] as well as [haven::as_factor()], by appending
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original attributes except for "class" after converting to factor to avoid
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ta loss in case of rich formatted and labelled data.'><meta property="og:image" content="https://agdamsbo.github.io/REDCapCAST/logo.png"></head><body>
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<small class="nav-text text-muted me-auto" data-bs-toggle="tooltip" data-bs-placement="bottom" title="">24.11.2</small>
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<img src="../logo.png" class="logo" alt=""><h1>Convert labelled vectors to factors while preserving attributes</h1>
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<small class="dont-index">Source: <a href="https://github.com/agdamsbo/REDCapCAST/blob/main/R/as_factor.R" class="external-link"><code>R/as_factor.R</code></a></small>
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<div class="d-none name"><code>as_factor.Rd</code></div>
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</div>
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<div class="ref-description section level2">
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<p>This extends [forcats::as_factor()] as well as [haven::as_factor()], by appending
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original attributes except for "class" after converting to factor to avoid
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ta loss in case of rich formatted and labelled data.</p>
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</div>
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<div class="section level2">
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<h2 id="ref-usage">Usage<a class="anchor" aria-label="anchor" href="#ref-usage"></a></h2>
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<div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">as_factor</span><span class="op">(</span><span class="va">x</span>, <span class="va">...</span><span class="op">)</span></span>
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<span></span>
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<span><span class="co"># S3 method for class 'factor'</span></span>
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<span><span class="fu">as_factor</span><span class="op">(</span><span class="va">x</span>, <span class="va">...</span><span class="op">)</span></span>
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<span></span>
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<span><span class="co"># S3 method for class 'logical'</span></span>
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<span><span class="fu">as_factor</span><span class="op">(</span><span class="va">x</span>, <span class="va">...</span><span class="op">)</span></span>
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<span></span>
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<span><span class="co"># S3 method for class 'numeric'</span></span>
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<span><span class="fu">as_factor</span><span class="op">(</span><span class="va">x</span>, <span class="va">...</span><span class="op">)</span></span>
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<span></span>
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<span><span class="co"># S3 method for class 'character'</span></span>
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<span><span class="fu">as_factor</span><span class="op">(</span><span class="va">x</span>, <span class="va">...</span><span class="op">)</span></span>
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<span></span>
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<span><span class="co"># S3 method for class 'haven_labelled'</span></span>
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<span><span class="fu">as_factor</span><span class="op">(</span></span>
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<span> <span class="va">x</span>,</span>
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<span> levels <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="st">"default"</span>, <span class="st">"labels"</span>, <span class="st">"values"</span>, <span class="st">"both"</span><span class="op">)</span>,</span>
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<span> ordered <span class="op">=</span> <span class="cn">FALSE</span>,</span>
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<span> <span class="va">...</span></span>
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<span><span class="op">)</span></span>
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<span></span>
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<span><span class="co"># S3 method for class 'labelled'</span></span>
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<span><span class="fu">as_factor</span><span class="op">(</span></span>
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<span> <span class="va">x</span>,</span>
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<span> levels <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="st">"default"</span>, <span class="st">"labels"</span>, <span class="st">"values"</span>, <span class="st">"both"</span><span class="op">)</span>,</span>
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<span> ordered <span class="op">=</span> <span class="cn">FALSE</span>,</span>
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<span> <span class="va">...</span></span>
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<span><span class="op">)</span></span></code></pre></div>
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</div>
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<div class="section level2">
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<h2 id="arguments">Arguments<a class="anchor" aria-label="anchor" href="#arguments"></a></h2>
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<dl><dt id="arg-x">x<a class="anchor" aria-label="anchor" href="#arg-x"></a></dt>
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<dd><p>Object to coerce to a factor.</p></dd>
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<dt id="arg--">...<a class="anchor" aria-label="anchor" href="#arg--"></a></dt>
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<dd><p>Other arguments passed down to method.</p></dd>
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<dt id="arg-levels">levels<a class="anchor" aria-label="anchor" href="#arg-levels"></a></dt>
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<dd><p>How to create the levels of the generated factor:</p>
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<p>* "default": uses labels where available, otherwise the values.
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Labels are sorted by value.
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* "both": like "default", but pastes together the level and value
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* "label": use only the labels; unlabelled values become `NA`
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* "values": use only the values</p></dd>
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<dt id="arg-ordered">ordered<a class="anchor" aria-label="anchor" href="#arg-ordered"></a></dt>
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<dd><p>If `TRUE` create an ordered (ordinal) factor, if
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`FALSE` (the default) create a regular (nominal) factor.</p></dd>
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</dl></div>
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<div class="section level2">
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<h2 id="details">Details<a class="anchor" aria-label="anchor" href="#details"></a></h2>
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<p>Please refer to parent functions for extended documentation.
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To avoid redundancy calls and errors, functions are copy-pasted here</p>
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</div>
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<div class="section level2">
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<h2 id="ref-examples">Examples<a class="anchor" aria-label="anchor" href="#ref-examples"></a></h2>
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<div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span><span class="co"># will preserve all attributes</span></span></span>
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<span class="r-in"><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">4</span>, <span class="fl">3</span>, <span class="st">"A"</span>, <span class="fl">7</span>, <span class="fl">8</span>, <span class="fl">1</span><span class="op">)</span> <span class="op">|></span> <span class="fu">as_factor</span><span class="op">(</span><span class="op">)</span></span></span>
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<span class="r-out co"><span class="r-pr">#></span> [1] 1 4 3 A 7 8 1</span>
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<span class="r-out co"><span class="r-pr">#></span> Levels: 1 4 3 A 7 8</span>
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<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/structure.html" class="external-link">structure</a></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">1</span>, <span class="fl">2</span>, <span class="fl">3</span>, <span class="fl">2</span>, <span class="fl">10</span>, <span class="fl">9</span><span class="op">)</span>,</span></span>
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<span class="r-in"><span> labels <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>Unknown <span class="op">=</span> <span class="fl">9</span>, Refused <span class="op">=</span> <span class="fl">10</span><span class="op">)</span></span></span>
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<span class="r-in"><span><span class="op">)</span> <span class="op">|></span></span></span>
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<span class="r-in"><span> <span class="fu">as_factor</span><span class="op">(</span><span class="op">)</span> <span class="op">|></span> <span class="fu"><a href="https://rdrr.io/r/base/dput.html" class="external-link">dput</a></span><span class="op">(</span><span class="op">)</span></span></span>
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<span class="r-out co"><span class="r-pr">#></span> structure(c(1L, 2L, 3L, 2L, 5L, 4L), levels = c("1", "2", "3", </span>
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<span class="r-out co"><span class="r-pr">#></span> "9", "10"), class = "factor", labels = c(Unknown = 9, Refused = 10</span>
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<span class="r-out co"><span class="r-pr">#></span> ))</span>
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<span class="r-in"><span></span></span>
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<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/structure.html" class="external-link">structure</a></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">1</span>, <span class="fl">2</span>, <span class="fl">3</span>, <span class="fl">2</span>, <span class="fl">10</span>, <span class="fl">9</span><span class="op">)</span>,</span></span>
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<span class="r-in"><span> labels <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>Unknown <span class="op">=</span> <span class="fl">9</span>, Refused <span class="op">=</span> <span class="fl">10</span><span class="op">)</span>,</span></span>
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<span class="r-in"><span> class <span class="op">=</span> <span class="st">"haven_labelled"</span></span></span>
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<span class="r-in"><span><span class="op">)</span> <span class="op">|></span></span></span>
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<span class="r-in"><span> <span class="fu">as_factor</span><span class="op">(</span><span class="op">)</span></span></span>
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<span class="r-out co"><span class="r-pr">#></span> [1] 1 2 3 2 Refused Unknown</span>
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<span class="r-out co"><span class="r-pr">#></span> attr(,"labels")</span>
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<span class="r-out co"><span class="r-pr">#></span> Unknown Refused </span>
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<span class="r-out co"><span class="r-pr">#></span> 9 10 </span>
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<span class="r-out co"><span class="r-pr">#></span> Levels: 1 2 3 Unknown Refused</span>
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</code></pre></div>
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<p>Developed by Andreas Gammelgaard Damsbo, Paul Egeler.</p>
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