ons.</p>
    </div>
    <div class="section level2">
    <h2 id="a-note-about-flags">A note about flags<a class="anchor" aria-label="anchor" href="#a-note-about-flags"></a></h2>



<p>Data-quality flags contained within the original object are ignored by this
function, and the returned value contains no such flags.  This is because such
flags represent an assessment of the original data, not of quantities derived
from those data.  This function produces a warning to this effect. The
recommended practice is 