ommended).</p>
<ul>
<li><a href="https://www.r-project.org" class="external-link uri">https://www.r-project.org</a></li>
</ul>
<p>3D visualisation is provided by the rgl package based on OpenGL. On Mac OS X if you use RStudio or R from the terminal, you must have a copy of XQuartz, the X11 window manager, installed. This is no longer a default install since Mac OS X 10.8. You need to install XQuartz, before installing the nat package. Logout and login for the installation to take effect. You can get it from