modify reddit classifier
This commit is contained in:
DOHA
parent
df215fc026
commit
d752fe77ec
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@ -1,13 +1,17 @@
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package org.baeldung.reddit.classifier;
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import java.io.BufferedReader;
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import java.io.FileReader;
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import java.io.File;
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import java.io.IOException;
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import java.nio.charset.Charset;
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import java.util.ArrayList;
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import java.util.Calendar;
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import java.util.List;
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import java.util.TimeZone;
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import org.apache.mahout.classifier.sgd.AdaptiveLogisticRegression;
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import org.apache.mahout.classifier.sgd.CrossFoldLearner;
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import org.apache.mahout.classifier.sgd.L2;
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import org.apache.mahout.classifier.sgd.OnlineLogisticRegression;
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import org.apache.mahout.math.NamedVector;
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import org.apache.mahout.math.RandomAccessSparseVector;
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import org.apache.mahout.math.Vector;
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import org.apache.mahout.vectorizer.encoders.AdaptiveWordValueEncoder;
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@ -15,22 +19,25 @@ import org.apache.mahout.vectorizer.encoders.FeatureVectorEncoder;
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import org.apache.mahout.vectorizer.encoders.StaticWordValueEncoder;
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import com.google.common.base.Splitter;
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import com.google.common.io.Files;
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public class RedditClassifier {
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public static int GOOD = 0;
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public static int BAD = 1;
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public static int MIN_SCORE = 5;
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private final OnlineLogisticRegression classifier;
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public static int MIN_SCORE = 10;
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private final AdaptiveLogisticRegression classifier;
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private final FeatureVectorEncoder titleEncoder;
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private final FeatureVectorEncoder domainEncoder;
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private CrossFoldLearner learner;
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private final int[] trainCount = { 0, 0 };
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private final int[] evalCount = { 0, 0 };
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public RedditClassifier() {
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classifier = new OnlineLogisticRegression(2, 4, new L2(1));
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classifier = new AdaptiveLogisticRegression(2, 4, new L2());
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classifier.setPoolSize(25);
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titleEncoder = new AdaptiveWordValueEncoder("title");
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titleEncoder.setProbes(1);
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domainEncoder = new StaticWordValueEncoder("domain");
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@ -38,27 +45,35 @@ public class RedditClassifier {
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}
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public void trainClassifier(String fileName) throws IOException {
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final BufferedReader reader = new BufferedReader(new FileReader(fileName));
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final List<NamedVector> vectors = extractVectors(readDataFile(fileName));
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int category;
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Vector features;
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String line = reader.readLine();
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if (line == null) {
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new RedditDataCollector().collectData();
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}
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while ((line != null) && (line != "")) {
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category = extractCategory(line);
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for (final NamedVector vector : vectors) {
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category = (vector.getName() == "GOOD") ? GOOD : BAD;
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classifier.train(category, vector);
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trainCount[category]++;
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features = convertLineToVector(line);
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classifier.train(category, features);
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line = reader.readLine();
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}
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reader.close();
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System.out.println("Training count ========= " + trainCount[0] + "___" + trainCount[1]);
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}
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public int classify(Vector features) {
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return classifier.classifyFull(features).maxValueIndex();
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public double evaluateClassifier() throws IOException {
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final List<NamedVector> vectors = extractVectors(readDataFile(RedditDataCollector.TEST_FILE));
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int category, result;
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int correct = 0;
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int wrong = 0;
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for (final NamedVector vector : vectors) {
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category = (vector.getName() == "GOOD") ? GOOD : BAD;
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result = classify(vector);
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evalCount[category]++;
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if (category == result) {
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correct++;
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} else {
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wrong++;
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}
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}
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System.out.println(correct + " ----- " + wrong);
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System.out.println("Eval count ========= " + evalCount[0] + "___" + evalCount[1]);
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return correct / (wrong + correct + 0.0);
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}
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public Vector convertPost(String title, String domain, int hour) {
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@ -71,49 +86,50 @@ public class RedditClassifier {
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return features;
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}
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public double evaluateClassifier() throws IOException {
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final BufferedReader reader = new BufferedReader(new FileReader(RedditDataCollector.TEST_FILE));
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int category, result;
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int correct = 0;
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int wrong = 0;
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Vector features;
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String line = reader.readLine();
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while ((line != null) && (line != "")) {
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category = extractCategory(line);
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evalCount[category]++;
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features = convertLineToVector(line);
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result = classify(features);
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if (category == result) {
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correct++;
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} else {
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wrong++;
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}
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line = reader.readLine();
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public int classify(Vector features) {
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if (learner == null) {
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learner = classifier.getBest().getPayload().getLearner();
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}
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reader.close();
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System.out.println(correct + " ----- " + wrong);
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System.out.println("Eval count ========= " + evalCount[0] + "___" + evalCount[1]);
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return correct / (wrong + correct + 0.0);
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return learner.classifyFull(features).maxValueIndex();
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}
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// ==== private
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private int extractCategory(String line) {
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final int score = Integer.parseInt(line.substring(0, line.indexOf(';')));
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return (score < MIN_SCORE) ? BAD : GOOD;
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// ==== Private methods
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private List<String> readDataFile(String fileName) throws IOException {
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List<String> lines = Files.readLines(new File(fileName), Charset.forName("utf-8"));
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if ((lines == null) || (lines.size() == 0)) {
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new RedditDataCollector().collectData();
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lines = Files.readLines(new File(fileName), Charset.forName("utf-8"));
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}
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lines.remove(0);
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return lines;
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}
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private Vector convertLineToVector(String line) {
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final Vector features = new RandomAccessSparseVector(4);
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final String[] items = line.split(";");
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private List<NamedVector> extractVectors(List<String> lines) {
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final List<NamedVector> vectors = new ArrayList<NamedVector>(lines.size());
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for (final String line : lines) {
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vectors.add(extractVector(line));
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}
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return vectors;
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}
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private NamedVector extractVector(String line) {
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final String[] items = line.split(",");
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final String category = extractCategory(Integer.parseInt(items[0]));
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final NamedVector vector = new NamedVector(new RandomAccessSparseVector(4), category);
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final Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("GMT"));
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cal.setTimeInMillis(Long.parseLong(items[1]) * 1000);
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final int hour = cal.get(Calendar.HOUR_OF_DAY);
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titleEncoder.addToVector(items[3], features);
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domainEncoder.addToVector(items[4], features);
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features.set(2, hour); // hour of day
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features.set(3, Integer.parseInt(items[2])); // number of words in the title
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return features;
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titleEncoder.addToVector(items[3], vector);
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domainEncoder.addToVector(items[4], vector);
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vector.set(2, cal.get(Calendar.HOUR_OF_DAY)); // hour of day
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vector.set(3, Integer.parseInt(items[2])); // number of words in the title
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return vector;
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}
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private String extractCategory(int score) {
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return (score < MIN_SCORE) ? "BAD" : "GOOD";
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}
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}
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@ -47,12 +47,14 @@ public class RedditDataCollector {
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timestamp = System.currentTimeMillis() / 1000;
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try {
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final FileWriter writer = new FileWriter(TRAINING_FILE);
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writer.write("Score, Timestamp in utc, Number of wrods in title, Title, Domain \n");
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for (int i = 0; i < noOfRounds; i++) {
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getPosts(writer);
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}
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writer.close();
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final FileWriter testWriter = new FileWriter(TEST_FILE);
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testWriter.write("Score, Timestamp in utc, Number of wrods in title, Title, Domain \n");
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getPosts(testWriter);
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testWriter.close();
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} catch (final Exception e) {
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@ -83,9 +85,9 @@ public class RedditDataCollector {
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words = Splitter.onPattern("\\W").omitEmptyStrings().splitToList(child.get("data").get("title").asText());
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timestamp = child.get("data").get("created_utc").asLong();
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line = score + ";";
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line += timestamp + ";";
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line += words.size() + ";" + Joiner.on(' ').join(words) + ";";
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line = score + ",";
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line += timestamp + ",";
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line += words.size() + "," + Joiner.on(' ').join(words) + ",";
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line += child.get("data").get("domain").asText() + "\n";
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writer.write(line);
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}
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Score, Timestamp in utc, Number of wrods in title, Title, Domain
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|
||||
0,1356593886,2,AffineTransform halp,self.java
|
||||
43,1356584047,7,Java Was Strongly Influenced by Objective C,cs.gmu.edu
|
||||
1,1356580543,7,Having trouble Setting Up Android Development Environment,self.java
|
||||
0,1356560732,13,How can I fetch the first X links of reddit into a list,self.java
|
||||
0,1356551788,4,JDK Download page error,self.java
|
||||
9,1356536557,12,looking for a good book website to learn intermediate core java spring,self.java
|
||||
7,1356487079,11,A popup menu like Filemaker s Any library have an implementation,self.java
|
||||
1,1356455255,6,Just a Few Helpful Solr Functions,ignatyev-dev.blogspot.ru
|
||||
13,1356433373,7,Bart s Blog Xtend the better compromise,bartnaudts.blogspot.de
|
||||
4,1356410180,3,Beginner Question Here,self.java
|
||||
19,1356283667,5,Nashorn JavaScript for the JVM,blogs.oracle.com
|
||||
0,1356234086,5,Problem with Java memory use,self.java
|
||||
0,1356195953,5,Learning Java in two weeks,self.java
|
||||
0,1356127053,10,Twitter4J Download a Twitter Users Tweets to a Text File,github.com
|
||||
20,1356118151,15,Using Apache Commons Functor functional interfaces with Java 8 lambdas cross post from r functionalprogramming,kinoshita.eti.br
|
||||
13,1356102153,7,Date and Time in Java 8 Timezones,insightfullogic.com
|
||||
10,1356088959,8,Implementing a collapsible ui repeat rows in JSF,kahimyang.info
|
||||
8,1356034544,5,OmniFaces 1 3 is released,balusc.blogspot.com
|
||||
1,1356027563,11,How to Configure a JNDI DataSource in the OpenShift Tomcat Cartridge,openshift.redhat.com
|
||||
82,1356020780,7,Doomsday Sale IntelliJ 75 off today only,jetbrains.com
|
||||
3,1355976320,3,IntelliJ Working Directory,self.java
|
||||
0,1355966433,5,Help with java problem please,self.java
|
||||
17,1355928745,12,What s new in Servlet 3 1 Java EE 7 moving forward,blogs.oracle.com
|
||||
11,1355864485,5,Quick poll for research project,self.java
|
||||
0,1355851994,5,Eclipse Text Problem Need Help,self.java
|
||||
29,1355823193,4,Java 8 vs Xtend,blog.efftinge.de
|
||||
2,1355805047,4,Learning Java between semesters,self.java
|
||||
6,1355798488,11,I m a beginner programmer any tips on where to start,self.java
|
||||
7,1355784039,9,Java Advent Calendar far sight look at JDK 8,javaadvent.com
|
||||
2,1355782111,9,Technical Interview coming up Suggestions Pointers Words of Wisdom,self.java
|
||||
0,1355775350,6,someone may help me out here,stackoverflow.com
|
||||
2,1355765235,14,THC and a bit of Thunking Creative ways to deal with multiple return types,kingsfleet.blogspot.it
|
||||
0,1355749586,12,Newbie here can you explain to me what class private stack is,self.java
|
||||
0,1355748318,4,When StackOverflow Goes Bad,blogs.windward.net
|
||||
0,1355721981,4,Java Graphics Projectile HELP,self.java
|
||||
0,1355719622,12,Which one of the following statements about object oriented programming is false,self.java
|
||||
16,1355707814,8,What s the skinny on JavaFX these days,self.java
|
||||
2,1355685929,20,Can someone explain exactly what Apache Ant is How does it differ from just creating a jar file in blueJ,self.java
|
||||
4,1355621071,7,Looking to add test code in Github,self.java
|
||||
7,1355613608,6,Java Version of Jarvis Must Haves,self.java
|
||||
5,1355599765,6,Java Advent Calendar Functional Java Collections,javaadvent.com
|
||||
7,1355597483,13,I m working on a text based RPG and I have some questions,self.java
|
||||
2,1355574445,6,Java EE 7 Community Survey Results,blog.eisele.net
|
||||
0,1355576629,4,Evolution of Java Technology,compilr.org
|
||||
18,1355574828,10,Are your Garbage Collection Logs speaking to you Censum does,blog.eisele.net
|
||||
10,1355559380,13,What is the best GUI tool for creating a 2d platformer in Java,self.java
|
||||
0,1355555357,7,Hit me with your best arrays tutorial,self.java
|
||||
10,1355542403,11,Does any one know of clean 2d graphics library for java,self.java
|
||||
23,1355511507,9,Dark Juno A Dark UI Theme for Eclipse 4,rogerdudler.github.com
|
||||
0,1355504132,10,Java devs that work remote I have a few questions,self.java
|
||||
0,1355501999,9,How do you make use of your Java knowledge,self.java
|
||||
1,1355492027,5,How ClassLoader works in Java,javarevisited.blogspot.com.au
|
||||
0,1355489352,9,Main difference between Abstract Class and Interface Compilr org,compilr.org
|
||||
48,1355487006,8,Date and Time in Java 8 Part 1,insightfullogic.com
|
||||
0,1355485766,3,Java JSON problem,self.java
|
||||
10,1355448875,16,Open source applications large small worth looking at in Java I want to understand application structure,self.java
|
||||
1,1355444452,4,lo mexor pz xxx,heavy-r.com
|
||||
0,1355402889,11,JRebel Remoting to Push Changes to Your Toaster in The Cloud,zeroturnaround.com
|
||||
0,1355402734,6,Are bugs part of technical debt,swreflections.blogspot.ca
|
||||
2,1355400483,9,Compile and Run Java programs with Sublime Text 2,compilr.org
|
||||
0,1355391115,4,console input like craftbukkit,self.java
|
||||
7,1355390023,8,Hosting suggestions needed for a java web app,self.java
|
||||
6,1355359227,17,Java novice here Have noticed funny performance differences across laptop and desktop Nvidia optimus related Details inside,self.java
|
||||
1,1355327090,18,Please advice which java server technology should I choose for this new web app in my new work,self.java
|
||||
0,1355326137,6,code to convert digits into words,compilr.org
|
||||
34,1355319442,7,I want to learn REAL WORLD Java,self.java
|
||||
5,1355285442,3,Hiring Java Developers,self.java
|
||||
0,1355282335,14,Help How can I count the amount of a specific integer in an ArrayList,self.java
|
||||
1,1355272303,24,I m taking a Java 1 final tomorrow I m fairly confident but I would appreciate any tips on things to look out for,self.java
|
||||
38,1355267143,6,Will Java become the next COBOL,self.java
|
||||
0,1355263047,2,Understanding recursion,imgur.com
|
||||
1,1355257558,15,How can I clear the command prompt terminal with java and make it cross platform,self.java
|
||||
2,1355253849,18,Is there a strategy for reducing code clutter when you are printing to the terminal alot Beginner Programmer,self.java
|
||||
1,1355253049,5,BlockingQueues and multiple producer threads,self.java
|
||||
1,1355241441,6,Beginner Struggling with classes Need help,self.java
|
||||
0,1355238089,8,Simple Steps to Merge PDF files using Java,compilr.org
|
||||
23,1355236940,8,Java and vs Python within a business context,self.java
|
||||
|
|
|
|||
|
File diff suppressed because it is too large
Load Diff
|
|
@ -7,10 +7,9 @@ import java.io.IOException;
|
|||
import org.baeldung.reddit.classifier.RedditClassifier;
|
||||
import org.baeldung.reddit.classifier.RedditDataCollector;
|
||||
import org.junit.Before;
|
||||
import org.junit.Ignore;
|
||||
import org.junit.Test;
|
||||
|
||||
@Ignore
|
||||
//@Ignore
|
||||
public class RedditClassifierTest {
|
||||
|
||||
private RedditClassifier classifier;
|
||||
|
|
@ -27,4 +26,5 @@ public class RedditClassifierTest {
|
|||
System.out.println("Accuracy = " + result);
|
||||
assertTrue(result > 0.8);
|
||||
}
|
||||
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue