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| <img src="" class="logo" alt=""><h1>Returns a stratified sample without replacement</h1> |
| |
| <div class="d-none name"><code>sampleBy.Rd</code></div> |
| </div> |
| |
| <div class="ref-description section level2"> |
| <p>Returns a stratified sample without replacement based on the fraction given on each |
| stratum.</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">sampleBy</span><span class="op">(</span><span class="va">x</span>, <span class="va">col</span>, <span class="va">fractions</span>, <span class="va">seed</span><span class="op">)</span></span> |
| <span></span> |
| <span><span class="co"># S4 method for SparkDataFrame,character,list,numeric</span></span> |
| <span><span class="fu">sampleBy</span><span class="op">(</span><span class="va">x</span>, <span class="va">col</span>, <span class="va">fractions</span>, <span class="va">seed</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>x</dt> |
| <dd><p>A SparkDataFrame</p></dd> |
| |
| |
| <dt>col</dt> |
| <dd><p>column that defines strata</p></dd> |
| |
| |
| <dt>fractions</dt> |
| <dd><p>A named list giving sampling fraction for each stratum. If a stratum is |
| not specified, we treat its fraction as zero.</p></dd> |
| |
| |
| <dt>seed</dt> |
| <dd><p>random seed</p></dd> |
| |
| </dl></div> |
| <div class="section level2"> |
| <h2 id="value">Value<a class="anchor" aria-label="anchor" href="#value"></a></h2> |
| |
| |
| <p>A new SparkDataFrame that represents the stratified sample</p> |
| </div> |
| <div class="section level2"> |
| <h2 id="note">Note<a class="anchor" aria-label="anchor" href="#note"></a></h2> |
| <p>sampleBy since 1.6.0</p> |
| </div> |
| <div class="section level2"> |
| <h2 id="see-also">See also<a class="anchor" aria-label="anchor" href="#see-also"></a></h2> |
| <div class="dont-index"><p>Other stat functions: |
| <code><a href="approxQuantile.html">approxQuantile</a>()</code>, |
| <code><a href="corr.html">corr</a>()</code>, |
| <code><a href="cov.html">cov</a>()</code>, |
| <code><a href="crosstab.html">crosstab</a>()</code>, |
| <code><a href="freqItems.html">freqItems</a>()</code></p></div> |
| </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="va">df</span> <span class="op"><-</span> <span class="fu"><a href="read.json.html">read.json</a></span><span class="op">(</span><span class="st">"/path/to/file.json"</span><span class="op">)</span></span></span> |
| <span class="r-in"><span><span class="va">sample</span> <span class="op"><-</span> <span class="fu">sampleBy</span><span class="op">(</span><span class="va">df</span>, <span class="st">"key"</span>, <span class="va">fractions</span>, <span class="fl">36</span><span class="op">)</span></span></span> |
| <span class="r-in"><span><span class="op">}</span></span></span> |
| </code></pre></div> |
| </div> |
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