 figuring out
what the interval of the data is and what instances are missing. It will insert
a record for each of the missing time points. For all
other variables in the data frame a missing value will be inserted at the padded rows.</p>
    
    </div>

    <pre class="usage"><span class='fu'>pad</span>(<span class='no'>x</span>, <span class='kw'>interval</span> <span class='kw'>=</span> <span class='kw'>NULL</span>, <span class='kw'>start_val</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,