   Type        String with 'd' for dynamic flexibility (displacement/force)</span>
0015 <span class="comment">%                   String with 'v' for mobility (velocity/force) (Default)</span>
0016 <span class="comment">%                   String with 'a' for accelerance (acceleration/force)</span>
0017 <span class="comment">%       N           length(f), number of frequency values to compute H on</span>
0018 <span class="comment">%</span>
0019 <span class="comment">% Note: For all modes, only one mode shap