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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>Extract attribute. Returns NA if none — get_attr • 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="Extract attribute. Returns NA if none — get_attr"><meta name="description" content="Extract attribute. Returns NA if none"><meta property="og:description" content="Extract attribute. Returns NA if none"><meta property="og:image" content="https://agdamsbo.github.io/REDCapCAST/logo.png"></head><body>
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<img src="../logo.png" class="logo" alt=""><h1>Extract attribute. Returns NA if none</h1>
<small class="dont-index">Source: <a href="https://github.com/agdamsbo/REDCapCAST/blob/main/R/ds2dd_detailed.R" class="external-link"><code>R/ds2dd_detailed.R</code></a></small>
<div class="d-none name"><code>get_attr.Rd</code></div>
</div>
<div class="ref-description section level2">
<p>Extract attribute. Returns NA if none</p>
</div>
<div class="section level2">
<h2 id="ref-usage">Usage<a class="anchor" aria-label="anchor" href="#ref-usage"></a></h2>
<div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">get_attr</span><span class="op">(</span><span class="va">data</span>, attr <span class="op">=</span> <span class="cn">NULL</span><span class="op">)</span></span></code></pre></div>
</div>
<div class="section level2">
<h2 id="arguments">Arguments<a class="anchor" aria-label="anchor" href="#arguments"></a></h2>
<dl><dt id="arg-data">data<a class="anchor" aria-label="anchor" href="#arg-data"></a></dt>
<dd><p>vector</p></dd>
<dt id="arg-attr">attr<a class="anchor" aria-label="anchor" href="#arg-attr"></a></dt>
<dd><p>attribute name</p></dd>
</dl></div>
<div class="section level2">
<h2 id="value">Value<a class="anchor" aria-label="anchor" href="#value"></a></h2>
<p>character vector</p>
</div>
<div class="section level2">
<h2 id="ref-examples">Examples<a class="anchor" aria-label="anchor" href="#ref-examples"></a></h2>
<div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/attr.html" class="external-link">attr</a></span><span class="op">(</span><span class="va">mtcars</span><span class="op">$</span><span class="va">mpg</span>, <span class="st">"label"</span><span class="op">)</span> <span class="op">&lt;-</span> <span class="st">"testing"</span></span></span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/lapply.html" class="external-link">sapply</a></span><span class="op">(</span><span class="va">mtcars</span>, <span class="va">get_attr</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $mpg</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $mpg$label</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [1] "testing"</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $cyl</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $disp</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $hp</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $drat</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $wt</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $qsec</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $vs</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $am</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $gear</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $carb</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/lapply.html" class="external-link">lapply</a></span><span class="op">(</span><span class="va">mtcars</span>, \<span class="op">(</span><span class="va">.x</span><span class="op">)</span><span class="fu">get_attr</span><span class="op">(</span><span class="va">.x</span>, <span class="cn">NULL</span><span class="op">)</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $mpg</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $mpg$label</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [1] "testing"</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $cyl</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $disp</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $hp</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $drat</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $wt</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $qsec</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $vs</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $am</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $gear</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $carb</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-in"><span><span class="va">mtcars</span> <span class="op">|&gt;</span></span></span>
<span class="r-in"><span> <span class="fu"><a href="numchar2fct.html">numchar2fct</a></span><span class="op">(</span>numeric.threshold <span class="op">=</span> <span class="fl">6</span><span class="op">)</span> <span class="op">|&gt;</span></span></span>
<span class="r-in"><span> <span class="fu"><a href="ds2dd_detailed.html">ds2dd_detailed</a></span><span class="op">(</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $data</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #949494;"># A tibble: 32 × 11</span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> mpg cyl disp hp drat wt qsec vs am gear carb </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #949494; font-style: italic;">&lt;dbl&gt;</span> <span style="color: #949494; font-style: italic;">&lt;fct&gt;</span> <span style="color: #949494; font-style: italic;">&lt;dbl&gt;</span> <span style="color: #949494; font-style: italic;">&lt;dbl&gt;</span> <span style="color: #949494; font-style: italic;">&lt;dbl&gt;</span> <span style="color: #949494; font-style: italic;">&lt;dbl&gt;</span> <span style="color: #949494; font-style: italic;">&lt;dbl&gt;</span> <span style="color: #949494; font-style: italic;">&lt;fct&gt;</span> <span style="color: #949494; font-style: italic;">&lt;fct&gt;</span> <span style="color: #949494; font-style: italic;">&lt;fct&gt;</span> <span style="color: #949494; font-style: italic;">&lt;fct&gt;</span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;"> 1</span> 21 6 160 110 3.9 2.62 16.5 0 1 4 4 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;"> 2</span> 21 6 160 110 3.9 2.88 17.0 0 1 4 4 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;"> 3</span> 22.8 4 108 93 3.85 2.32 18.6 1 1 4 1 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;"> 4</span> 21.4 6 258 110 3.08 3.22 19.4 1 0 3 1 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;"> 5</span> 18.7 8 360 175 3.15 3.44 17.0 0 0 3 2 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;"> 6</span> 18.1 6 225 105 2.76 3.46 20.2 1 0 3 1 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;"> 7</span> 14.3 8 360 245 3.21 3.57 15.8 0 0 3 4 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;"> 8</span> 24.4 4 147. 62 3.69 3.19 20 1 0 4 2 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;"> 9</span> 22.8 4 141. 95 3.92 3.15 22.9 1 0 4 2 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;">10</span> 19.2 6 168. 123 3.92 3.44 18.3 1 0 4 4 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #949494;"># ℹ 22 more rows</span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $meta</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #949494;"># A tibble: 11 × 18</span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> field_name form_name section_header field_type field_label</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #949494; font-style: italic;">&lt;chr&gt;</span> <span style="color: #949494; font-style: italic;">&lt;chr&gt;</span> <span style="color: #949494; font-style: italic;">&lt;lgl&gt;</span> <span style="color: #949494; font-style: italic;">&lt;chr&gt;</span> <span style="color: #949494; font-style: italic;">&lt;chr&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;"> 1</span> mpg data <span style="color: #BB0000;">NA</span> text testing </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;"> 2</span> cyl data <span style="color: #BB0000;">NA</span> radio cyl </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;"> 3</span> disp data <span style="color: #BB0000;">NA</span> text disp </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;"> 4</span> hp data <span style="color: #BB0000;">NA</span> text hp </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;"> 5</span> drat data <span style="color: #BB0000;">NA</span> text drat </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;"> 6</span> wt data <span style="color: #BB0000;">NA</span> text wt </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;"> 7</span> qsec data <span style="color: #BB0000;">NA</span> text qsec </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;"> 8</span> vs data <span style="color: #BB0000;">NA</span> radio vs </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;"> 9</span> am data <span style="color: #BB0000;">NA</span> radio am </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;">10</span> gear data <span style="color: #BB0000;">NA</span> radio gear </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;">11</span> carb data <span style="color: #BB0000;">NA</span> radio carb </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #949494;"># ℹ 13 more variables: select_choices_or_calculations &lt;chr&gt;, field_note &lt;lgl&gt;,</span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #949494;"># text_validation_type_or_show_slider_number &lt;chr&gt;,</span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #949494;"># text_validation_min &lt;lgl&gt;, text_validation_max &lt;lgl&gt;, identifier &lt;lgl&gt;,</span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #949494;"># branching_logic &lt;lgl&gt;, required_field &lt;lgl&gt;, custom_alignment &lt;lgl&gt;,</span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #949494;"># question_number &lt;lgl&gt;, matrix_group_name &lt;lgl&gt;, matrix_ranking &lt;lgl&gt;,</span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #949494;"># field_annotation &lt;lgl&gt;</span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
</code></pre></div>
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