
  <p>Changes profile shapes by using the value of <code>Shape</code> as
  an exponent.</p>
  <pre><code>shapedProfile = powf(profile, shape);</code></pre>
  </dd>
  <dt>Invert</dt>
  <dd>
  <p>Invert spectrum to make the maximum of absolute value to 0, and 0
  to the max-abs value. Signs are preserved. Phases aren’t
  considered.</p>
  <pre><code>maxRe = max(abs(spectrumRe))
maxIm = max(abs(spectrumIm))
invertedSpectrumRe = spectrumRe - sgn(spectrumRe) * maxRe
invertedSpectrumIm = spectrumIm - sgn(spectr