class="fullcomment"><div class="comment cmt"></div><dl class="paramcmts block"><dt class="param">dfA</dt><dd class="cmt"><p>one dataframe formatted with two columns one for the URI as String and one for feature vector as indexed feature vector representation (like from Spark MLlib Count Vectorizer)</p></dd><dt class="param">key</dt><dd class="cmt"><p>key vector representation like output from Count Vectorizer from MLlib</p></dd><dt class="param">k</dt><dd class="cmt"><p>number of nearest neighbors we want t