title: Use of ~ (tilde) in R programming Language
body: <p>I saw in a tutorial about regression modeling the following command:</p>
  <pre><code>myFormula &lt;- Species ~ Sepal.Length + Sepal.Width + Petal.Length + Petal.Width
  </code></pre>
  <p>What exactly does this command do, and what is the role of <code>~</code> (tilde) in the command?</p>