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    <p>By default, id_variable() will create a unique numeric identifier out of your ID variables, sequential following the order in the original data (<code>.method='number'</code>). However, you may want to remove the ordering and assign IDs randomly (<code>.method='random'</code>), or preserve all the original information and create a single fixed-width character ID variable that contains all the original information (<code>.method='character'</code>).</p>

    <h2 class="hasAnchor" id="examples"><a 