span></span>
<span><span class="fu"><a href="https://rdrr.io/pkg/oro.nifti/man/img_data-methods.html" class="external-link">img_data</a></span><span class="op">(</span><span class="va">above_zero</span><span class="op">)</span><span class="op">[</span><span class="fl">1</span><span class="op">]</span></span>
<span><span class="co">#&gt; [1] FALSE</span></span></code></pre></div>
<p>We will refer to binary images/<code>nifti</code> objects as “masks”.</p>
<p>We can combine multiple operators, such as cre