e></div>
    </div>

    <div class="ref-description">
    <p>Update or add columns when the given condition is met.</p>
<p><code>mutate_when</code> integrates <code>mutate</code> and <code>case_when</code>
in <span class="pkg">dplyr</span> and make a new tidy verb for data.table. <code>mutate_vars</code> is
 a super function to do updates in specific columns according to conditions.</p>
    </div>

    <div id="ref-usage">
    <div class="sourceCode"><pre class="sourceCode r"><code><span><span c