nvert 1D index used to access flmn array to (el,m,n) harmonic indices for a real signal.</p>
<dl class="section note"><dt>Note</dt><dd>Index ranges are as follows:<ul>
<li>el ranges from [0 .. L-1].</li>
<li>m ranges from [-el .. el].</li>
<li>n ranges from [0 .. el'], where el' = min{el, N}</li>
<li>ind ranges from [0 .. N*(L*L-(N-1)*(2*N-1)/6)-1] for compact storage methods and from [0 .. N*L*L-1] for 0-padded storage methods.</li>
</ul>
</dd></dl>
<dl class="params"><dt>Parameters</dt><dd>
  <table class