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<h1><span class="header-section-number">פרק 3</span> Data Frames</h1>
<p>Data Frame היא טבלה, מערך דו מימדי</p>
<div class="sourceCode" id="cb17"><pre class="sourceCode r"><code class="sourceCode r"><span id="cb17-1"><a href="data-frames.html#cb17-1" aria-hidden="true" tabindex="-1"></a><span class="co"># Create the data frame.</span></span>
<span id="cb17-2"><a href="data-frames.html#cb17-2" aria-hidden="true" tabindex="-1"></a>emp.data <span class="ot">&lt;-</span> <span class="fu">data.frame</span>(</span>
<span id="cb17-3"><a href="data-frames.html#cb17-3" aria-hidden="true" tabindex="-1"></a>   <span class="at">emp_id =</span> <span class="fu">c</span> (<span class="dv">1</span><span class="sc">:</span><span class="dv">5</span>), </span>
<span id="cb17-4"><a href="data-frames.html#cb17-4" aria-hidden="true" tabindex="-1"></a>   <span class="at">emp_name =</span> <span class="fu">c</span>(<span class="st">&quot;Rick&quot;</span>,<span class="st">&quot;Dan&quot;</span>,<span class="st">&quot;Michelle&quot;</span>,<span class="st">&quot;Ryan&quot;</span>,<span class="st">&quot;Gary&quot;</span>),</span>
<span id="cb17-5"><a href="data-frames.html#cb17-5" aria-hidden="true" tabindex="-1"></a>   <span class="at">salary =</span> <span class="fu">c</span>(<span class="fl">623.3</span>,<span class="fl">515.2</span>,<span class="fl">611.0</span>,<span class="fl">729.0</span>,<span class="fl">843.25</span>), </span>
<span id="cb17-6"><a href="data-frames.html#cb17-6" aria-hidden="true" tabindex="-1"></a>   <span class="at">start_date =</span> <span class="fu">as.Date</span>(<span class="fu">c</span>(<span class="st">&quot;2012-01-01&quot;</span>, <span class="st">&quot;2013-09-23&quot;</span>, <span class="st">&quot;2014-11-15&quot;</span>, <span class="st">&quot;2014-05-11&quot;</span>,</span>
<span id="cb17-7"><a href="data-frames.html#cb17-7" aria-hidden="true" tabindex="-1"></a>      <span class="st">&quot;2015-03-27&quot;</span>)),</span>
<span id="cb17-8"><a href="data-frames.html#cb17-8" aria-hidden="true" tabindex="-1"></a>   <span class="at">stringsAsFactors =</span> <span class="cn">FALSE</span></span>
<span id="cb17-9"><a href="data-frames.html#cb17-9" aria-hidden="true" tabindex="-1"></a>)</span>
<span id="cb17-10"><a href="data-frames.html#cb17-10" aria-hidden="true" tabindex="-1"></a><span class="co"># Print the data frame.         </span></span>
<span id="cb17-11"><a href="data-frames.html#cb17-11" aria-hidden="true" tabindex="-1"></a><span class="fu">print</span>(emp.data) </span></code></pre></div>
<pre><code>##   emp_id emp_name salary start_date
## 1      1     Rick 623.30 2012-01-01
## 2      2      Dan 515.20 2013-09-23
## 3      3 Michelle 611.00 2014-11-15
## 4      4     Ryan 729.00 2014-05-11
## 5      5     Gary 843.25 2015-03-27</code></pre>

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