" tabindex="-1"></a><span class="fu">cat</span>(<span class="st">&quot;ROI time-series matrix:&quot;</span>, <span class="fu">dim</span>(roi_mat), <span class="st">&quot;</span><span class="sc">\n</span><span class="st">&quot;</span>)</span>
<span id="cb14-15"><a href="#cb14-15" tabindex="-1"></a><span class="co">#&gt; ROI time-series matrix: 50 123</span></span>
<span id="cb14-16"><a href="#cb14-16" tabindex="-1"></a></span>
<span id="cb14-17"><a href="#cb14-17" tabindex="-1"></a><span class="co"># Compute