title: How do I load a package without installing it in R?
body: <p>I have built an R package but I do not want my users to have to install it before using it.</p>
  
  <p>Is there a way to load a package without having to install it?</p>
  
  <p>For example, if I have a package <code>mypackage.tar.gz</code>, is there something like</p>
  
  <pre><code>library("mypackage.tar.gz")
  </code></pre>
  
  <p>?</p>