rt help summary is shown (same as when typing <code>help chili</code>).
</p>

<p>
Up to three output arguments are returned:
</p>
<ul>
<li><code>B</code> or <code>nu</code>: magnetic field axis, in mT, or frequency axis, in GHz
<li><code>spc</code>: calculated spectrum
<li><code>info</code>: structure containing details about the calculation
</ul>

<p>
If no output argument is requested, <code>chili</code> plots the spectrum.
</p>

<p>
<code>chili</code> can simulate field-swept spectra as well as frequency