lated
         from the permutations of the input matrices</p></dd>
   <dt><code>mean</code></dt><dd><p>Average correlation coefficient produced by the permutations</p></dd>
   <dt><code>sd</code></dt><dd><p>Standard deviation of the sampled correlation coefficients</p></dd>
   <dt><code>p.value</code></dt><dd><p>Empirical p-value computed from the Mantel
         test: let <code>ngreater</code> be the number of correlation coefficients
         in <code>rsample</code> greater than or equal to <code>statist