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<img src="../logo.png" class="logo" alt=""><h1>Split REDCap repeating instruments table into multiple tables</h1>
<small class="dont-index">Source: <a href="https://github.com/agdamsbo/REDCapCAST/blob/HEAD/R/REDCap_split.r" class="external-link"><code>R/REDCap_split.r</code></a></small>
<div class="d-none name"><code>REDCap_split.Rd</code></div>
</div>
<div class="ref-description section level2">
<p>This will take output from a REDCap export and split it into a base table
and child tables for each repeating instrument. Metadata
is used to determine which fields should be included in each resultant table.</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">REDCap_split</span><span class="op">(</span></span>
<span> <span class="va">records</span>,</span>
<span> <span class="va">metadata</span>,</span>
<span> primary_table_name <span class="op">=</span> <span class="st">""</span>,</span>
<span> forms <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">"repeating"</span>, <span class="st">"all"</span><span class="op">)</span></span>
<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>records</dt>
<dd><p>Exported project records. May be a <code>data.frame</code>,
<code>response</code>, or <code>character</code> vector containing JSON from an API
call.</p></dd>
<dt>metadata</dt>
<dd><p>Project metadata (the data dictionary). May be a
<code>data.frame</code>, <code>response</code>, or <code>character</code> vector containing
JSON from an API call.</p></dd>
<dt>primary_table_name</dt>
<dd><p>Name given to the list element for the primary
output table (as described in <em>README.md</em>). Ignored if
<code>forms = 'all'</code>.</p></dd>
<dt>forms</dt>
<dd><p>Indicate whether to create separate tables for repeating
instruments only or for all forms.</p></dd>
</dl></div>
<div class="section level2">
<h2 id="value">Value<a class="anchor" aria-label="anchor" href="#value"></a></h2>
<p>A list of <code>"data.frame"</code>s. The number of tables will differ
depending on the <code>forms</code> option selected.</p>
<p></p>
<ul><li><p><code>'repeating'</code>: one base table and one or more
tables for each repeating instrument.</p></li>
<li><p><code>'all'</code>: a data.frame for each instrument, regardless of
whether it is a repeating instrument or not.</p></li>
</ul></div>
<div class="section level2">
<h2 id="author">Author<a class="anchor" aria-label="anchor" href="#author"></a></h2>
<p>Paul W. Egeler, M.S., GStat</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="kw">if</span> <span class="op">(</span><span class="cn">FALSE</span><span class="op">)</span> <span class="op">{</span></span></span>
<span class="r-in"><span><span class="co"># Using an API call -------------------------------------------------------</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="kw"><a href="https://rdrr.io/r/base/library.html" class="external-link">library</a></span><span class="op">(</span><span class="va">RCurl</span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># Get the records</span></span></span>
<span class="r-in"><span><span class="va">records</span> <span class="op">&lt;-</span> <span class="fu">postForm</span><span class="op">(</span></span></span>
<span class="r-in"><span> uri <span class="op">=</span> <span class="va">api_url</span>, <span class="co"># Supply your site-specific URI</span></span></span>
<span class="r-in"><span> token <span class="op">=</span> <span class="va">api_token</span>, <span class="co"># Supply your own API token</span></span></span>
<span class="r-in"><span> content <span class="op">=</span> <span class="st">'record'</span>,</span></span>
<span class="r-in"><span> format <span class="op">=</span> <span class="st">'json'</span>,</span></span>
<span class="r-in"><span> returnFormat <span class="op">=</span> <span class="st">'json'</span></span></span>
<span class="r-in"><span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># Get the metadata</span></span></span>
<span class="r-in"><span><span class="va">metadata</span> <span class="op">&lt;-</span> <span class="fu">postForm</span><span class="op">(</span></span></span>
<span class="r-in"><span> uri <span class="op">=</span> <span class="va">api_url</span>, <span class="co"># Supply your site-specific URI</span></span></span>
<span class="r-in"><span> token <span class="op">=</span> <span class="va">api_token</span>, <span class="co"># Supply your own API token</span></span></span>
<span class="r-in"><span> content <span class="op">=</span> <span class="st">'metadata'</span>,</span></span>
<span class="r-in"><span> format <span class="op">=</span> <span class="st">'json'</span></span></span>
<span class="r-in"><span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># Convert exported JSON strings into a list of data.frames</span></span></span>
<span class="r-in"><span><span class="fu">REDCapRITS</span><span class="fu">::</span><span class="fu">REDCap_split</span><span class="op">(</span><span class="va">records</span>, <span class="va">metadata</span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># Using a raw data export -------------------------------------------------</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># Get the records</span></span></span>
<span class="r-in"><span><span class="va">records</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/utils/read.table.html" class="external-link">read.csv</a></span><span class="op">(</span><span class="st">"/path/to/data/ExampleProject_DATA_2018-06-03_1700.csv"</span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># Get the metadata</span></span></span>
<span class="r-in"><span><span class="va">metadata</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/utils/read.table.html" class="external-link">read.csv</a></span><span class="op">(</span></span></span>
<span class="r-in"><span><span class="st">"/path/to/data/ExampleProject_DataDictionary_2018-06-03.csv"</span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># Split the tables</span></span></span>
<span class="r-in"><span><span class="fu">REDCapRITS</span><span class="fu">::</span><span class="fu">REDCap_split</span><span class="op">(</span><span class="va">records</span>, <span class="va">metadata</span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># In conjunction with the R export script ---------------------------------</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># You must set the working directory first since the REDCap data export</span></span></span>
<span class="r-in"><span><span class="co"># script contains relative file references.</span></span></span>
<span class="r-in"><span><span class="va">old</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/base/getwd.html" class="external-link">getwd</a></span><span class="op">(</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/getwd.html" class="external-link">setwd</a></span><span class="op">(</span><span class="st">"/path/to/data/"</span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># Run the data export script supplied by REDCap.</span></span></span>
<span class="r-in"><span><span class="co"># This will create a data.frame of your records called 'data'</span></span></span>
<span class="r-in"><span><span class="kw"><a href="https://rdrr.io/r/base/source.html" class="external-link">source</a></span><span class="op">(</span><span class="st">"ExampleProject_R_2018-06-03_1700.r"</span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># Get the metadatan</span></span></span>
<span class="r-in"><span><span class="va">metadata</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/utils/read.table.html" class="external-link">read.csv</a></span><span class="op">(</span><span class="st">"ExampleProject_DataDictionary_2018-06-03.csv"</span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># Split the tables</span></span></span>
<span class="r-in"><span><span class="fu">REDCapRITS</span><span class="fu">::</span><span class="fu">REDCap_split</span><span class="op">(</span><span class="va">data</span>, <span class="va">metadata</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/getwd.html" class="external-link">setwd</a></span><span class="op">(</span><span class="va">old</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="op">}</span></span></span>
</code></pre></div>
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