<p>a list with the column sums for the response
    (<code>csum1</code>)and the preditor (<code>csum2</code>)
    (symmetric CoCA only).</p></dd>

    <h2 class="hasAnchor" id="references"><a class="anchor" href="#references"></a>References</h2>

    

<p>ter Braak, C.J.F and Schaffers, A.P. (2004) Co-Correspondence
  Analysis: a new ordination method to relate two community
  compositions. <em>Ecology</em> <b>85(3)</b>, 834--846</p>
    <h2 class="hasAnchor" id="see-also"><a class="anchor" href="#see-also"