nDF</span><span class="params">(<span name="df">df: <span class="extype" name="org.apache.spark.sql.DataFrame">DataFrame</span></span>, <span name="key">key: <span class="extype" name="org.apache.spark.ml.linalg.Vector">Vector</span></span>, <span name="keyUri">keyUri: <span class="extype" name="scala.Predef.String">String</span> = <span class="symbol">&quot;unknown&quot;</span></span>)</span><span class="result">: <span class="extype" name="org.apache.spark.sql.DataFrame">DataFrame</span></span>
      </sp