os.precision(15);</div>
<div class="line">  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; num_samples; i++) {</div>
<div class="line">    <span class="comment">// skip the non-contact data</span></div>
<div class="line">    <span class="keywordflow">if</span> (ds_cnt_feats[i][0] &lt; 0)</div>
<div class="line">      <span class="keywordflow">continue</span>;</div>
<div class="line"> </div>
<div class="line">    <span class="keywordflow">for</span> (<span class="key