ss="identifier">addColumn</span><span class="symbol">(</span><span class="identifier" id="krangl.DataFrame$addColumn(krangl.ColumnFormula)/tf">tf</span><span class="symbol">:</span>&nbsp;<a href="../-column-formula/index.html"><span class="identifier">ColumnFormula</span></a><span class="symbol">)</span><span class="symbol">: </span><a href="index.html"><span class="identifier">DataFrame</span></a></code>
<p>Adds new variables and preserves existing.</p>
<a name="krangl.DataFrame$addColumn(kotlin.String, ko