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Posted to commits@mahout.apache.org by bu...@apache.org on 2015/04/23 02:57:56 UTC
svn commit: r948822 - in /websites/staging/mahout/trunk/content: ./
users/environment/classify-a-doc-from-the-shell.html
Author: buildbot
Date: Thu Apr 23 00:57:55 2015
New Revision: 948822
Log:
Staging update by buildbot for mahout
Added:
websites/staging/mahout/trunk/content/users/environment/classify-a-doc-from-the-shell.html
Modified:
websites/staging/mahout/trunk/content/ (props changed)
Propchange: websites/staging/mahout/trunk/content/
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+ <h1 id="classifying-a-document-with-the-mahout-shell">Classifying a Document with the Mahout Shell</h1>
+<p>This tutorial assumes that you have Spark configured for the <code>spark-shell</code> See <a href="http://mahout.apache.org/users/sparkbindings/play-with-shell.html">Playing with Mahout's Shell</a>. As well we assume that Mahout is running in cluster mode (i.e. with the <code>MAHOUT_LOCAL</code> environment variable unset) so that the output is put into HDFS.</p>
+<h2 id="downloading-and-vectorizing-the-wikipedia-dataset">Downloading and Vectorizing the wikipedia dataset</h2>
+<p><em>As of Mahout v0.10.0, we are still reliant on the MapReduce versions of <code>mahout seqwiki</code> and <code>mahout seq2sparse</code> to extract and vectorize our text. A</em> <a href="https://issues.apache.org/jira/browse/MAHOUT-1663"><em>Spark implemenation of seq2sparse</em></a> <em>is in the works for Mahout v0.11.</em> However, to download the wikipedia dataset, extract the bodies of the documentation, label each document and vectorize the text into TF-IDF vectors, we can sipmly run the <a href="https://github.com/apache/mahout/blob/master/examples/bin/classify-wikipedia.sh">wikipedia-classifier.sh</a> example. </p>
+<div class="codehilite"><pre><span class="n">Please</span> <span class="n">select</span> <span class="n">a</span> <span class="n">number</span> <span class="n">to</span> <span class="n">choose</span> <span class="n">the</span> <span class="n">corresponding</span> <span class="n">task</span> <span class="n">to</span> <span class="n">run</span>
+1<span class="p">.</span> <span class="n">CBayes</span> <span class="p">(</span><span class="n">may</span> <span class="n">require</span> <span class="n">increased</span> <span class="n">heap</span> <span class="n">space</span> <span class="n">on</span> <span class="n">yarn</span><span class="p">)</span>
+2<span class="p">.</span> <span class="n">BinaryCBayes</span>
+3<span class="p">.</span> <span class="n">clean</span> <span class="o">--</span> <span class="n">cleans</span> <span class="n">up</span> <span class="n">the</span> <span class="n">work</span> <span class="n">area</span> <span class="n">in</span> <span class="o">/</span><span class="n">tmp</span><span class="o">/</span><span class="n">mahout</span><span class="o">-</span><span class="n">work</span><span class="o">-</span><span class="n">wiki</span>
+<span class="n">Enter</span> <span class="n">your</span> <span class="n">choice</span> <span class="p">:</span>
+</pre></div>
+
+
+<p>Enter (2). This will download a large recent XML dump of the wikipedia database, into a <code>/tmp/mahout-work-wiki</code> directory, unzip it and place it into HDFS. It will run a <a href="http://mahout.apache.org/users/classification/wikipedia-classifier-example.html">MapReduce job to parse the wikipedia set</a>, extracting and labeling only pages with category tags for [United States] and [United Kingdom]. It will then run <code>mahout seq2sparse</code> to convert the documents into TF-IDF vectors. The script will also a build and test a <a href="http://mahout.apache.org/users/classification/bayesian.html">Naive Bayes model using MapReduce</a>. When it is completed, you should see a confusion matrix on your screen. For this tutorial, we will ignore the MapReduce model, and build a new model using Spark based on the vectorization data created by <code>seq2sparse</code>.</p>
+<h2 id="getting-started">Getting Started</h2>
+<p>Launch the <code>mahout-shell</code>. There is an example script: <code>spark-document-classifier.mscala</code> (<code>.mscala</code> denotes a Mahout-Scala script which can be run similarly to an R-script). We will be walking through this script for this tutorial but if you wanted to simply run the script, you could just issue the command: </p>
+<div class="codehilite"><pre><span class="n">mahout</span><span class="o">></span> <span class="p">:</span><span class="n">load</span> <span class="o">/</span><span class="n">path</span><span class="o">/</span><span class="n">to</span><span class="o">/</span><span class="n">mahout</span><span class="o">/</span><span class="n">examples</span><span class="o">/</span><span class="n">bin</span><span class="o">/</span><span class="n">spark</span><span class="o">-</span><span class="n">document</span><span class="o">-</span><span class="n">classifier</span><span class="p">.</span><span class="n">mscala</span>
+</pre></div>
+
+
+<p>For now, lets take the script apart piece by piece.</p>
+<h2 id="imports">Imports</h2>
+<p>Our mahout Naive Bayes Imports:</p>
+<div class="codehilite"><pre><span class="n">import</span> <span class="n">org</span><span class="p">.</span><span class="n">apache</span><span class="p">.</span><span class="n">mahout</span><span class="p">.</span><span class="n">classifier</span><span class="p">.</span><span class="n">naivebayes</span><span class="p">.</span><span class="n">_</span>
+<span class="n">import</span> <span class="n">org</span><span class="p">.</span><span class="n">apache</span><span class="p">.</span><span class="n">mahout</span><span class="p">.</span><span class="n">classifier</span><span class="p">.</span><span class="n">stats</span><span class="p">.</span><span class="n">_</span>
+<span class="n">import</span> <span class="n">org</span><span class="p">.</span><span class="n">apache</span><span class="p">.</span><span class="n">mahout</span><span class="p">.</span><span class="n">nlp</span><span class="p">.</span><span class="n">tfidf</span><span class="p">.</span><span class="n">_</span>
+</pre></div>
+
+
+<p>Hadoop Imports needed to read our dictionary:</p>
+<div class="codehilite"><pre><span class="n">import</span> <span class="n">org</span><span class="p">.</span><span class="n">apache</span><span class="p">.</span><span class="n">hadoop</span><span class="p">.</span><span class="n">io</span><span class="p">.</span><span class="n">Text</span>
+<span class="n">import</span> <span class="n">org</span><span class="p">.</span><span class="n">apache</span><span class="p">.</span><span class="n">hadoop</span><span class="p">.</span><span class="n">io</span><span class="p">.</span><span class="n">IntWritable</span>
+<span class="n">import</span> <span class="n">org</span><span class="p">.</span><span class="n">apache</span><span class="p">.</span><span class="n">hadoop</span><span class="p">.</span><span class="n">io</span><span class="p">.</span><span class="n">LongWritable</span>
+</pre></div>
+
+
+<h2 id="read-in-our-full-set-from-hdfs-as-vectorized-by-seq2sparse-in-classify-wikipediash">read in our full set from HDFS as vectorized by seq2sparse in classify-wikipedia.sh</h2>
+<div class="codehilite"><pre><span class="n">val</span> <span class="n">pathToData</span> <span class="p">=</span> "<span class="o">/</span><span class="n">tmp</span><span class="o">/</span><span class="n">mahout</span><span class="o">-</span><span class="n">work</span><span class="o">-</span><span class="n">wiki</span><span class="o">/</span>"
+<span class="n">val</span> <span class="n">fullData</span> <span class="p">=</span> <span class="n">drmDfsRead</span><span class="p">(</span><span class="n">pathToData</span> <span class="o">+</span> "<span class="n">wikipediaVecs</span><span class="o">/</span><span class="n">tfidf</span><span class="o">-</span><span class="n">vectors</span>"<span class="p">)</span>
+</pre></div>
+
+
+<h2 id="extract-the-category-of-each-observation-and-aggregate-those-observation-by-category">extract the category of each observation and aggregate those observation by category</h2>
+<div class="codehilite"><pre><span class="n">val</span> <span class="p">(</span><span class="n">labelIndex</span><span class="p">,</span> <span class="n">aggregatedObservations</span><span class="p">)</span> <span class="p">=</span> <span class="n">SparkNaiveBayes</span><span class="p">.</span><span class="n">extractLabelsAndAggregateObservations</span><span class="p">(</span><span class="n">fullData</span><span class="p">)</span>
+</pre></div>
+
+
+<h2 id="build-a-muitinomial-naive-bayes-model-and-self-test-on-the-training-set">build a Muitinomial Naive Bayes model and self test on the training set</h2>
+<div class="codehilite"><pre><span class="n">val</span> <span class="n">model</span> <span class="p">=</span> <span class="n">SparkNaiveBayes</span><span class="p">.</span><span class="n">train</span><span class="p">(</span><span class="n">aggregatedObservations</span><span class="p">,</span> <span class="n">labelIndex</span><span class="p">,</span> <span class="n">false</span><span class="p">)</span>
+<span class="n">val</span> <span class="n">resAnalyzer</span> <span class="p">=</span> <span class="n">SparkNaiveBayes</span><span class="p">.</span><span class="n">test</span><span class="p">(</span><span class="n">model</span><span class="p">,</span> <span class="n">fullData</span><span class="p">,</span> <span class="n">false</span><span class="p">)</span>
+<span class="n">println</span><span class="p">(</span><span class="n">resAnalyzer</span><span class="p">)</span>
+</pre></div>
+
+
+<p>printing the result analyzer will display the confusion matrix</p>
+<h2 id="read-in-the-dictionary-and-document-frequency-count-from-hdfs">read in the dictionary and document frequency count from HDFS</h2>
+<div class="codehilite"><pre><span class="n">val</span> <span class="n">dictionary</span> <span class="p">=</span> <span class="n">sdc</span><span class="p">.</span><span class="n">sequenceFile</span><span class="p">(</span><span class="n">pathToData</span> <span class="o">+</span> "<span class="n">wikipediaVecs</span><span class="o">/</span><span class="n">dictionary</span><span class="p">.</span><span class="n">file</span><span class="o">-</span>0"<span class="p">,</span>
+ <span class="n">classOf</span><span class="p">[</span><span class="n">Text</span><span class="p">],</span>
+ <span class="n">classOf</span><span class="p">[</span><span class="n">IntWritable</span><span class="p">])</span>
+<span class="n">val</span> <span class="n">documentFrequencyCount</span> <span class="p">=</span> <span class="n">sdc</span><span class="p">.</span><span class="n">sequenceFile</span><span class="p">(</span><span class="n">pathToData</span> <span class="o">+</span> "<span class="n">wikipediaVecs</span><span class="o">/</span><span class="n">df</span><span class="o">-</span><span class="n">count</span>"<span class="p">,</span>
+ <span class="n">classOf</span><span class="p">[</span><span class="n">IntWritable</span><span class="p">],</span>
+ <span class="n">classOf</span><span class="p">[</span><span class="n">LongWritable</span><span class="p">])</span>
+
+<span class="o">//</span> <span class="n">setup</span> <span class="n">the</span> <span class="n">dictionary</span> <span class="n">and</span> <span class="n">document</span> <span class="n">frequency</span> <span class="n">count</span> <span class="n">as</span> <span class="n">maps</span>
+<span class="n">val</span> <span class="n">dictionaryRDD</span> <span class="p">=</span> <span class="n">dictionary</span><span class="p">.</span><span class="n">map</span> <span class="p">{</span>
+ <span class="k">case</span> <span class="p">(</span><span class="n">wKey</span><span class="p">,</span> <span class="n">wVal</span><span class="p">)</span> <span class="p">=</span><span class="o">></span> <span class="n">wKey</span><span class="p">.</span><span class="n">asInstanceOf</span><span class="p">[</span><span class="n">Text</span><span class="p">]</span>
+ <span class="p">.</span><span class="n">toString</span><span class="p">()</span> <span class="o">-></span> <span class="n">wVal</span><span class="p">.</span><span class="n">get</span><span class="p">()</span>
+ <span class="p">}</span>
+
+<span class="n">val</span> <span class="n">documentFrequencyCountRDD</span> <span class="p">=</span> <span class="n">documentFrequencyCount</span><span class="p">.</span><span class="n">map</span> <span class="p">{</span>
+ <span class="k">case</span> <span class="p">(</span><span class="n">wKey</span><span class="p">,</span> <span class="n">wVal</span><span class="p">)</span> <span class="p">=</span><span class="o">></span> <span class="n">wKey</span><span class="p">.</span><span class="n">asInstanceOf</span><span class="p">[</span><span class="n">IntWritable</span><span class="p">]</span>
+ <span class="p">.</span><span class="n">get</span><span class="p">()</span> <span class="o">-></span> <span class="n">wVal</span><span class="p">.</span><span class="n">get</span><span class="p">()</span>
+ <span class="p">}</span>
+
+<span class="n">val</span> <span class="n">dictionaryMap</span> <span class="p">=</span> <span class="n">dictionaryRDD</span><span class="p">.</span><span class="n">collect</span><span class="p">.</span><span class="n">map</span><span class="p">(</span><span class="n">x</span> <span class="p">=</span><span class="o">></span> <span class="n">x</span><span class="p">.</span><span class="n">_1</span><span class="p">.</span><span class="n">toString</span> <span class="o">-></span> <span class="n">x</span><span class="p">.</span><span class="n">_2</span><span class="p">.</span><span class="n">toInt</span><span class="p">).</span><span class="n">toMap</span>
+<span class="n">val</span> <span class="n">dfCountMap</span> <span class="p">=</span> <span class="n">documentFrequencyCountRDD</span><span class="p">.</span><span class="n">collect</span><span class="p">.</span><span class="n">map</span><span class="p">(</span><span class="n">x</span> <span class="p">=</span><span class="o">></span> <span class="n">x</span><span class="p">.</span><span class="n">_1</span><span class="p">.</span><span class="n">toInt</span> <span class="o">-></span> <span class="n">x</span><span class="p">.</span><span class="n">_2</span><span class="p">.</span><span class="n">toLong</span><span class="p">).</span><span class="n">toMap</span>
+</pre></div>
+
+
+<h2 id="define-a-function-to-tokeinze-and-vectorize-new-text-using-our-current-dictionary">define a function to tokeinze and vectorize new text using our current dictionary</h2>
+<p>For this simple example, our function ```vectorizeDocument(...) will tokenize a new document into unigrams using native Java String methods and vectorize usingour dictionary and document frequencies. You could also use a <a href="https://lucene.apache.org/core/">Lucene</a> analyzer for bigrams, trigrams, etc., and integrate Apache <a href="https://tika.apache.org/">Tika</a> to extract text from different document types (PDF, PPT, XLS, etc.). Here, however we will kwwp ot simple and split ouor text using regexs and native String methods.</p>
+<div class="codehilite"><pre>def vectorizeDocument<span class="p">(</span>document: String<span class="p">,</span>
+ dictionaryMap: Map<span class="p">[</span>String<span class="p">,</span>Int<span class="p">],</span>
+ dfMap: Map<span class="p">[</span>Int<span class="p">,</span>Long<span class="p">])</span>: Vector <span class="o">=</span> <span class="p">{</span>
+ val wordCounts <span class="o">=</span> document.replaceAll<span class="p">(</span><span class="s">"[^\\p{L}\\p{Nd}]+"</span><span class="p">,</span> <span class="s">" "</span><span class="p">)</span>
+ <span class="m">.</span>toLowerCase
+ <span class="m">.</span>split<span class="p">(</span><span class="s">" "</span><span class="p">)</span>
+ <span class="m">.</span>groupBy<span class="p">(</span>identity<span class="p">)</span>
+ <span class="m">.</span>mapValues<span class="p">(</span>_<span class="m">.</span>length<span class="p">)</span>
+ val vec <span class="o">=</span> new RandomAccessSparseVector<span class="p">(</span>dictionaryMap.size<span class="p">)</span>
+ val totalDFSize <span class="o">=</span> dfMap<span class="p">(</span><span class="m">-1</span><span class="p">)</span>
+ val docSize <span class="o">=</span> wordCounts.size
+ <span class="kr">for</span> <span class="p">(</span>word <span class="o"><-</span> wordCounts<span class="p">)</span> <span class="p">{</span>
+ val term <span class="o">=</span> word._1
+ <span class="kr">if</span> <span class="p">(</span>dictionaryMap.contains<span class="p">(</span>term<span class="p">))</span> <span class="p">{</span>
+ val tfidf: TermWeight <span class="o">=</span> new TFIDF<span class="p">()</span>
+ val termFreq <span class="o">=</span> word._2
+ val dictIndex <span class="o">=</span> dictionaryMap<span class="p">(</span>term<span class="p">)</span>
+ val docFreq <span class="o">=</span> dfCountMap<span class="p">(</span>dictIndex<span class="p">)</span>
+ val currentTfIdf <span class="o">=</span> tfidf.calculate<span class="p">(</span>termFreq<span class="p">,</span>
+ docFreq.toInt<span class="p">,</span>
+ docSize<span class="p">,</span>
+ totalDFSize.toInt<span class="p">)</span>
+ vec.setQuick<span class="p">(</span>dictIndex<span class="p">,</span> currentTfIdf<span class="p">)</span>
+ <span class="p">}</span>
+ <span class="p">}</span>
+ vec
+<span class="p">}</span>
+</pre></div>
+
+
+<h2 id="setup-our-classifier">setup our classifier</h2>
+<div class="codehilite"><pre><span class="n">val</span> <span class="n">labelMap</span> <span class="p">=</span> <span class="n">model</span><span class="p">.</span><span class="n">labelIndex</span>
+<span class="n">val</span> <span class="n">numLabels</span> <span class="p">=</span> <span class="n">model</span><span class="p">.</span><span class="n">numLabels</span>
+<span class="n">val</span> <span class="n">reverseLabelMap</span> <span class="p">=</span> <span class="n">labelMap</span><span class="p">.</span><span class="n">map</span><span class="p">(</span><span class="n">x</span> <span class="p">=</span><span class="o">></span> <span class="n">x</span><span class="p">.</span><span class="n">_2</span> <span class="o">-></span> <span class="n">x</span><span class="p">.</span><span class="n">_1</span><span class="p">)</span>
+
+<span class="o">//</span> <span class="n">instantiate</span> <span class="n">the</span> <span class="n">correct</span> <span class="n">type</span> <span class="n">of</span> <span class="n">classifier</span>
+<span class="n">val</span> <span class="n">classifier</span> <span class="p">=</span> <span class="n">model</span><span class="p">.</span><span class="n">isComplementary</span> <span class="n">match</span> <span class="p">{</span>
+ <span class="k">case</span> <span class="n">true</span> <span class="p">=</span><span class="o">></span> <span class="n">new</span> <span class="n">ComplementaryNBClassifier</span><span class="p">(</span><span class="n">model</span><span class="p">)</span>
+ <span class="k">case</span> <span class="n">_</span> <span class="p">=</span><span class="o">></span> <span class="n">new</span> <span class="n">StandardNBClassifier</span><span class="p">(</span><span class="n">model</span><span class="p">)</span>
+<span class="p">}</span>
+</pre></div>
+
+
+<h2 id="define-an-argmax-function">define an argmax function</h2>
+<p>The label with the higest score wins the classification for a given document</p>
+<div class="codehilite"><pre>def argmax<span class="p">(</span>v: Vector<span class="p">)</span>: <span class="p">(</span>Int<span class="p">,</span> Double<span class="p">)</span> <span class="o">=</span> <span class="p">{</span>
+ var bestIdx: Int <span class="o">=</span> Integer.MIN_VALUE
+ var bestScore: Double <span class="o">=</span> Integer.MIN_VALUE.asInstanceOf<span class="p">[</span>Int<span class="p">]</span><span class="m">.</span>toDouble
+ <span class="kr">for</span><span class="p">(</span>i <span class="o"><-</span> <span class="m">0</span> until v.size<span class="p">)</span> <span class="p">{</span>
+ <span class="kr">if</span><span class="p">(</span>v<span class="p">(</span>i<span class="p">)</span> <span class="o">></span> bestScore<span class="p">){</span>
+ bestScore <span class="o">=</span> v<span class="p">(</span>i<span class="p">)</span>
+ bestIdx <span class="o">=</span> i
+ <span class="p">}</span>
+ <span class="p">}</span>
+ <span class="p">(</span>bestIdx<span class="p">,</span> bestScore<span class="p">)</span>
+<span class="p">}</span>
+</pre></div>
+
+
+<h2 id="define-our-final-tf-idf-vector-classifier">define our final TF(-IDF) vector classifier</h2>
+<div class="codehilite"><pre><span class="n">def</span> <span class="n">classifyDocument</span><span class="p">(</span><span class="n">clvec</span><span class="p">:</span> <span class="n">Vector</span><span class="p">)</span> <span class="p">:</span> <span class="n">String</span> <span class="p">=</span> <span class="p">{</span>
+ <span class="n">val</span> <span class="n">cvec</span> <span class="p">=</span> <span class="n">classifier</span><span class="p">.</span><span class="n">classifyFull</span><span class="p">(</span><span class="n">clvec</span><span class="p">)</span>
+ <span class="n">val</span> <span class="p">(</span><span class="n">bestIdx</span><span class="p">,</span> <span class="n">bestScore</span><span class="p">)</span> <span class="p">=</span> <span class="n">argmax</span><span class="p">(</span><span class="n">cvec</span><span class="p">)</span>
+ <span class="n">reverseLabelMap</span><span class="p">(</span><span class="n">bestIdx</span><span class="p">)</span>
+<span class="p">}</span>
+</pre></div>
+
+
+<h2 id="two-sample-news-articles-united-states-football-and-united-kingdom-football">Two sample news articles: United States Football and United Kingdom Football</h2>
+<div class="codehilite"><pre><span class="c1">// A random United States football article</span>
+<span class="c1">// http://www.reuters.com/article/2015/01/28/us-nfl-superbowl-security-idUSKBN0L12JR20150128</span>
+<span class="n">val</span> <span class="n">UStextToClassify</span> <span class="o">=</span> <span class="k">new</span> <span class="n">String</span><span class="p">(</span><span class="s">"(Reuters) - Super Bowl security officials acknowledge"</span> <span class="o">+</span>
+ <span class="s">" the NFL championship game represents a high profile target on a world stage but are"</span> <span class="o">+</span>
+ <span class="s">" unaware of any specific credible threats against Sunday's showcase. In advance of"</span> <span class="o">+</span>
+ <span class="s">" one of the world's biggest single day sporting events, Homeland Security Secretary"</span> <span class="o">+</span>
+ <span class="s">" Jeh Johnson was in Glendale on Wednesday to review security preparations and tour"</span> <span class="o">+</span>
+ <span class="s">" University of Phoenix Stadium where the Seattle Seahawks and New England Patriots"</span> <span class="o">+</span>
+ <span class="s">" will battle. Deadly shootings in Paris and arrest of suspects in Belgium, Greece and"</span> <span class="o">+</span>
+ <span class="s">" Germany heightened fears of more attacks around the world and social media accounts"</span> <span class="o">+</span>
+ <span class="s">" linked to Middle East militant groups have carried a number of threats to attack"</span> <span class="o">+</span>
+ <span class="s">" high-profile U.S. events. There is no specific credible threat, said Johnson, who"</span> <span class="o">+</span>
+ <span class="s">" has appointed a federal coordination team to work with local, state and federal"</span> <span class="o">+</span>
+ <span class="s">" agencies to ensure safety of fans, players and other workers associated with the"</span> <span class="o">+</span>
+ <span class="s">" Super Bowl. I'm confident we will have a safe and secure and successful event."</span> <span class="o">+</span>
+ <span class="s">" Sunday's game has been given a Special Event Assessment Rating (SEAR) 1 rating, the"</span> <span class="o">+</span>
+ <span class="s">" same as in previous years, except for the year after the Sept. 11, 2001 attacks, when"</span> <span class="o">+</span>
+ <span class="s">" a higher level was declared. But security will be tight and visible around Super"</span> <span class="o">+</span>
+ <span class="s">" Bowl-related events as well as during the game itself. All fans will pass through"</span> <span class="o">+</span>
+ <span class="s">" metal detectors and pat downs. Over 4,000 private security personnel will be deployed"</span> <span class="o">+</span>
+ <span class="s">" and the almost 3,000 member Phoenix police force will be on Super Bowl duty. Nuclear"</span> <span class="o">+</span>
+ <span class="s">" device sniffing teams will be deployed and a network of Bio-Watch detectors will be"</span> <span class="o">+</span>
+ <span class="s">" set up to provide a warning in the event of a biological attack. The Department of"</span> <span class="o">+</span>
+ <span class="s">" Homeland Security (DHS) said in a press release it had held special cyber-security"</span> <span class="o">+</span>
+ <span class="s">" and anti-sniper training sessions. A U.S. official said the Transportation Security"</span> <span class="o">+</span>
+ <span class="s">" Administration, which is responsible for screening airline passengers, will add"</span> <span class="o">+</span>
+ <span class="s">" screeners and checkpoint lanes at airports. Federal air marshals, behavior detection"</span> <span class="o">+</span>
+ <span class="s">" officers and dog teams will help to secure transportation systems in the area. We"</span> <span class="o">+</span>
+ <span class="s">" will be ramping it (security) up on Sunday, there is no doubt about that, said Federal"</span><span class="o">+</span>
+ <span class="s">" Coordinator Matthew Allen, the DHS point of contact for planning and support. I have"</span> <span class="o">+</span>
+ <span class="s">" every confidence the public safety agencies that represented in the planning process"</span> <span class="o">+</span>
+ <span class="s">" are going to have their best and brightest out there this weekend and we will have"</span> <span class="o">+</span>
+ <span class="s">" a very safe Super Bowl."</span><span class="p">)</span>
+
+<span class="c1">// A random United Kingdom football article</span>
+<span class="c1">// http://www.reuters.com/article/2015/01/26/manchester-united-swissquote-idUSL6N0V52RZ20150126</span>
+<span class="n">val</span> <span class="n">UKtextToClassify</span> <span class="o">=</span> <span class="k">new</span> <span class="n">String</span><span class="p">(</span><span class="s">"(Reuters) - Manchester United have signed a sponsorship"</span> <span class="o">+</span>
+ <span class="s">" deal with online financial trading company Swissquote, expanding the commercial"</span> <span class="o">+</span>
+ <span class="s">" partnerships that have helped to make the English club one of the richest teams in"</span> <span class="o">+</span>
+ <span class="s">" world soccer. United did not give a value for the deal, the club's first in the sector,"</span> <span class="o">+</span>
+ <span class="s">" but said on Monday it was a multi-year agreement. The Premier League club, 20 times"</span> <span class="o">+</span>
+ <span class="s">" English champions, claim to have 659 million followers around the globe, making the"</span> <span class="o">+</span>
+ <span class="s">" United name attractive to major brands like Chevrolet cars and sportswear group Adidas."</span> <span class="o">+</span>
+ <span class="s">" Swissquote said the global deal would allow it to use United's popularity in Asia to"</span> <span class="o">+</span>
+ <span class="s">" help it meet its targets for expansion in China. Among benefits from the deal,"</span> <span class="o">+</span>
+ <span class="s">" Swissquote's clients will have a chance to meet United players and get behind the scenes"</span> <span class="o">+</span>
+ <span class="s">" at the Old Trafford stadium. Swissquote is a Geneva-based online trading company that"</span> <span class="o">+</span>
+ <span class="s">" allows retail investors to buy and sell foreign exchange, equities, bonds and other asset"</span> <span class="o">+</span>
+ <span class="s">" classes. Like other retail FX brokers, Swissquote was left nursing losses on the Swiss"</span> <span class="o">+</span>
+ <span class="s">" franc after Switzerland's central bank stunned markets this month by abandoning its cap"</span> <span class="o">+</span>
+ <span class="s">" on the currency. The fallout from the abrupt move put rival and West Ham United shirt"</span> <span class="o">+</span>
+ <span class="s">" sponsor Alpari UK into administration. Swissquote itself was forced to book a 25 million"</span> <span class="o">+</span>
+ <span class="s">" Swiss francs ($28 million) provision for its clients who were left out of pocket"</span> <span class="o">+</span>
+ <span class="s">" following the franc's surge. United's ability to grow revenues off the pitch has made"</span> <span class="o">+</span>
+ <span class="s">" them the second richest club in the world behind Spain's Real Madrid, despite a"</span> <span class="o">+</span>
+ <span class="s">" downturn in their playing fortunes. United Managing Director Richard Arnold said"</span> <span class="o">+</span>
+ <span class="s">" there was still lots of scope for United to develop sponsorships in other areas of"</span> <span class="o">+</span>
+ <span class="s">" business. The last quoted statistics that we had showed that of the top 25 sponsorship"</span> <span class="o">+</span>
+ <span class="s">" categories, we were only active in 15 of those, Arnold told Reuters. I think there is a"</span> <span class="o">+</span>
+ <span class="s">" huge potential still for the club, and the other thing we have seen is there is very"</span> <span class="o">+</span>
+ <span class="s">" significant growth even within categories. United have endured a tricky transition"</span> <span class="o">+</span>
+ <span class="s">" following the retirement of manager Alex Ferguson in 2013, finishing seventh in the"</span> <span class="o">+</span>
+ <span class="s">" Premier League last season and missing out on a place in the lucrative Champions League."</span> <span class="o">+</span>
+ <span class="s">" ($1 = 0.8910 Swiss francs) (Writing by Neil Maidment, additional reporting by Jemima"</span> <span class="o">+</span>
+ <span class="s">" Kelly; editing by Keith Weir)"</span><span class="p">)</span>
+</pre></div>
+
+
+<h2 id="vectorize-and-classify-our-documents">vectorize and classify our documents</h2>
+<div class="codehilite"><pre><span class="n">val</span> <span class="n">usVec</span> <span class="p">=</span> <span class="n">vectorizeDocument</span><span class="p">(</span><span class="n">UStextToClassify</span><span class="p">,</span> <span class="n">dictionaryMap</span><span class="p">,</span> <span class="n">dfCountMap</span><span class="p">)</span>
+<span class="n">val</span> <span class="n">ukVec</span> <span class="p">=</span> <span class="n">vectorizeDocument</span><span class="p">(</span><span class="n">UKtextToClassify</span><span class="p">,</span> <span class="n">dictionaryMap</span><span class="p">,</span> <span class="n">dfCountMap</span><span class="p">)</span>
+
+<span class="n">println</span><span class="p">(</span>"<span class="n">Classifying</span> <span class="n">the</span> <span class="n">news</span> <span class="n">article</span> <span class="n">about</span> <span class="n">superbowl</span> <span class="n">security</span> <span class="p">(</span><span class="n">united</span> <span class="n">states</span><span class="p">)</span>"<span class="p">)</span>
+<span class="n">classifyDocument</span><span class="p">(</span><span class="n">usVec</span><span class="p">)</span>
+
+<span class="n">println</span><span class="p">(</span>"<span class="n">Classifying</span> <span class="n">the</span> <span class="n">news</span> <span class="n">article</span> <span class="n">about</span> <span class="n">Manchester</span> <span class="n">United</span> <span class="p">(</span><span class="n">united</span> <span class="n">kingdom</span><span class="p">)</span>"<span class="p">)</span>
+<span class="n">classifyDocument</span><span class="p">(</span><span class="n">ukVec</span><span class="p">)</span>
+</pre></div>
+
+
+<h2 id="tie-everything-together-in-a-new-method-to-classify-new-text">tie everything together in a new method to classify new text</h2>
+<div class="codehilite"><pre><span class="n">def</span> <span class="n">classifyText</span><span class="p">(</span><span class="n">txt</span><span class="p">:</span> <span class="n">String</span><span class="p">):</span> <span class="n">String</span> <span class="p">=</span> <span class="p">{</span>
+ <span class="n">val</span> <span class="n">v</span> <span class="p">=</span> <span class="n">vectorizeDocument</span><span class="p">(</span><span class="n">txt</span><span class="p">,</span> <span class="n">dictionaryMap</span><span class="p">,</span> <span class="n">dfCountMap</span><span class="p">)</span>
+ <span class="n">classifyDocument</span><span class="p">(</span><span class="n">v</span><span class="p">)</span>
+
+<span class="p">}</span>
+</pre></div>
+
+
+<h2 id="now-we-can-simply-call-our-classifytext-method-on-any-string">now we can simply call our classifyText method on any string</h2>
+<div class="codehilite"><pre><span class="n">classifyText</span><span class="p">(</span>"<span class="n">Hello</span> <span class="n">world</span> <span class="n">from</span> <span class="n">Queens</span>"<span class="p">)</span>
+<span class="n">classifyText</span><span class="p">(</span>"<span class="n">Hello</span> <span class="n">world</span> <span class="n">from</span> <span class="n">London</span>"<span class="p">)</span>
+</pre></div>
+ </div>
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