  2.4869767      1</span></code></pre></div>
<p>Notice we have added positive labels in the third column to annotate whether both features are positive or negative. The example shows that this sample forms two clusters of negative and positive observation pairs, <span class="math inline">\(\mathcal{S}_-\)</span> and <span class="math inline">\(\mathcal{S}_+\)</span>. Clearly these disjoint subsamples are far apart, thus rendering the dataset itself not statistically homogeneous under the working definition.