/**
* Set the output format. Takes the current average class values and m_InputFormat and calls
* setOutputFormat(Instances) appropriately.
*/
private void setOutputFormat() {
Instances newData;
FastVector newAtts, newVals;
// Compute new attributes
newAtts = new FastVector(getInputFormat().numAttributes());
for (int j = 0; j < getInputFormat().numAttributes(); j++) {
Attribute att = getInputFormat().attribute(j);
if (!m_AttIndices.isInRange(j) || !att.isString()) {
// We don't have to copy the attribute because the
// attribute index remains unchanged.
newAtts.addElement(att);
} else {
// Compute list of attribute values
newVals = new FastVector(att.numValues());
for (int i = 0; i < att.numValues(); i++) {
newVals.addElement(att.value(i));
}
newAtts.addElement(new Attribute(att.name(), newVals));
}
}
// Construct new header
newData = new Instances(getInputFormat().relationName(), newAtts, 0);
newData.setClassIndex(getInputFormat().classIndex());
setOutputFormat(newData);
}
/**
* Method that finds all large itemsets for the given set of instances.
*
* @param the instances to be used
* @exception Exception if an attribute is numeric
*/
private void findLargeItemSets(int index) throws Exception {
FastVector kMinusOneSets, kSets = new FastVector();
Hashtable hashtable;
int i = 0;
// Find large itemsets
// of length 1
if (index == 1) {
kSets = ItemSet.singletons(m_instances);
ItemSet.upDateCounters(kSets, m_instances);
kSets = ItemSet.deleteItemSets(kSets, m_premiseCount, Integer.MAX_VALUE);
if (kSets.size() == 0) return;
m_Ls.addElement(kSets);
}
// of length > 1
if (index > 1) {
if (m_Ls.size() > 0) kSets = (FastVector) m_Ls.lastElement();
m_Ls.removeAllElements();
i = index - 2;
kMinusOneSets = kSets;
kSets = ItemSet.mergeAllItemSets(kMinusOneSets, i, m_instances.numInstances());
hashtable = ItemSet.getHashtable(kMinusOneSets, kMinusOneSets.size());
m_hashtables.addElement(hashtable);
kSets = ItemSet.pruneItemSets(kSets, hashtable);
ItemSet.upDateCounters(kSets, m_instances);
kSets = ItemSet.deleteItemSets(kSets, m_premiseCount, Integer.MAX_VALUE);
if (kSets.size() == 0) return;
m_Ls.addElement(kSets);
}
}
/**
* Set the labels for nominal attribute creation.
*
* @param labelList a comma separated list of labels
* @throws IllegalArgumentException if the labelList was invalid
*/
public void setNominalLabels(String labelList) {
FastVector labels = new FastVector(10);
// Split the labelList up into the vector
int commaLoc;
while ((commaLoc = labelList.indexOf(',')) >= 0) {
String label = labelList.substring(0, commaLoc).trim();
if (!label.equals("")) {
labels.addElement(label);
} else {
throw new IllegalArgumentException(
"Invalid label list at " + labelList.substring(commaLoc));
}
labelList = labelList.substring(commaLoc + 1);
}
String label = labelList.trim();
if (!label.equals("")) {
labels.addElement(label);
}
// If everything is OK, make the type change
m_Labels = labels;
if (labels.size() == 0) {
m_AttributeType = Attribute.NUMERIC;
} else {
m_AttributeType = Attribute.NOMINAL;
}
}
/**
* Sets up the structure for the plot instances. Sets m_PlotInstances to null if instances are not
* saved for visualization.
*
* @see #getSaveForVisualization()
*/
protected void determineFormat() {
FastVector hv;
Attribute predictedClass;
Attribute classAt;
FastVector attVals;
int i;
if (!m_SaveForVisualization) {
m_PlotInstances = null;
return;
}
hv = new FastVector();
classAt = m_Instances.attribute(m_ClassIndex);
if (classAt.isNominal()) {
attVals = new FastVector();
for (i = 0; i < classAt.numValues(); i++) attVals.addElement(classAt.value(i));
predictedClass = new Attribute("predicted" + classAt.name(), attVals);
} else {
predictedClass = new Attribute("predicted" + classAt.name());
}
for (i = 0; i < m_Instances.numAttributes(); i++) {
if (i == m_Instances.classIndex()) hv.addElement(predictedClass);
hv.addElement(m_Instances.attribute(i).copy());
}
m_PlotInstances =
new Instances(m_Instances.relationName() + "_predicted", hv, m_Instances.numInstances());
m_PlotInstances.setClassIndex(m_ClassIndex + 1);
}
/**
* Adds the prediction intervals as additional attributes at the end. Since classifiers can
* returns varying number of intervals per instance, the dataset is filled with missing values for
* non-existing intervals.
*/
protected void addPredictionIntervals() {
int maxNum;
int num;
int i;
int n;
FastVector preds;
FastVector atts;
Instances data;
Instance inst;
Instance newInst;
double[] values;
double[][] predInt;
// determine the maximum number of intervals
maxNum = 0;
preds = m_Evaluation.predictions();
for (i = 0; i < preds.size(); i++) {
num = ((NumericPrediction) preds.elementAt(i)).predictionIntervals().length;
if (num > maxNum) maxNum = num;
}
// create new header
atts = new FastVector();
for (i = 0; i < m_PlotInstances.numAttributes(); i++)
atts.addElement(m_PlotInstances.attribute(i));
for (i = 0; i < maxNum; i++) {
atts.addElement(new Attribute("predictionInterval_" + (i + 1) + "-lowerBoundary"));
atts.addElement(new Attribute("predictionInterval_" + (i + 1) + "-upperBoundary"));
atts.addElement(new Attribute("predictionInterval_" + (i + 1) + "-width"));
}
data = new Instances(m_PlotInstances.relationName(), atts, m_PlotInstances.numInstances());
data.setClassIndex(m_PlotInstances.classIndex());
// update data
for (i = 0; i < m_PlotInstances.numInstances(); i++) {
inst = m_PlotInstances.instance(i);
// copy old values
values = new double[data.numAttributes()];
System.arraycopy(inst.toDoubleArray(), 0, values, 0, inst.numAttributes());
// add interval data
predInt = ((NumericPrediction) preds.elementAt(i)).predictionIntervals();
for (n = 0; n < maxNum; n++) {
if (n < predInt.length) {
values[m_PlotInstances.numAttributes() + n * 3 + 0] = predInt[n][0];
values[m_PlotInstances.numAttributes() + n * 3 + 1] = predInt[n][1];
values[m_PlotInstances.numAttributes() + n * 3 + 2] = predInt[n][1] - predInt[n][0];
} else {
values[m_PlotInstances.numAttributes() + n * 3 + 0] = Utils.missingValue();
values[m_PlotInstances.numAttributes() + n * 3 + 1] = Utils.missingValue();
values[m_PlotInstances.numAttributes() + n * 3 + 2] = Utils.missingValue();
}
}
// create new Instance
newInst = new DenseInstance(inst.weight(), values);
data.add(newInst);
}
m_PlotInstances = data;
}
/**
* Read the sparse feature vector data from the data file and convert it into the Weka's instance
* format.
*/
public void readSparseFVsFromFile(
File dataFile, int numDocs, boolean trainingMode, int numLabels, boolean surroundMode) {
int numFeats = 0;
int numClasses = 0;
labelsFVDoc = new LabelsOfFeatureVectorDoc[numDocs];
// Read the sparse FVs by using the method in MultiClassLearning class
MultiClassLearning multiClassL = new MultiClassLearning();
boolean isUsingDataFile = false;
File tempFVDataFile = null;
multiClassL.getDataFromFile(numDocs, dataFile, isUsingDataFile, tempFVDataFile);
// Create the attributes.
numFeats = multiClassL.dataFVinDoc.getTotalNumFeatures();
FastVector attributes = new FastVector(numFeats + 1);
for (int i = 0; i < numFeats; ++i)
attributes.addElement(new Attribute(new Integer(i + 1).toString()));
// Add class attribute.
if (surroundMode) numClasses = 2 * numLabels + 1; // count the null too, as value -1.
else numClasses = numLabels + 1;
FastVector classValues = new FastVector(numClasses);
classValues.addElement("-1"); // The first class for null class
for (int i = 1; i < numClasses; ++i) classValues.addElement(new Integer(i).toString());
attributes.addElement(new Attribute("Class", classValues));
// Create the dataset with capacity of all FVs (but actuall number of FVs
// mabe be larger than the pre-specified, because possible multi-label) and
// set index of class
instancesData =
new Instances("SparseFVsData", attributes, multiClassL.dataFVinDoc.getNumTraining());
instancesData.setClassIndex(instancesData.numAttributes() - 1);
// Copy the data into the instance;
for (int iDoc = 0; iDoc < multiClassL.dataFVinDoc.getNumTrainingDocs(); ++iDoc) {
SparseFeatureVector[] fvs = multiClassL.dataFVinDoc.trainingFVinDoc[iDoc].getFvs();
labelsFVDoc[iDoc] = new LabelsOfFeatureVectorDoc();
labelsFVDoc[iDoc].multiLabels = multiClassL.dataFVinDoc.labelsFVDoc[iDoc].multiLabels;
for (int i = 0; i < fvs.length; ++i) {
// Object valueO = fvs[i].getValues();
double[] values = new double[fvs[i].getLen()];
int[] indexes = new int[fvs[i].getLen()];
for (int j = 0; j < fvs[i].getLen(); ++j) {
// values[j] = (double)fvs[i].values[j];
values[j] = fvs[i].nodes[j].value;
indexes[j] = fvs[i].nodes[j].index;
}
SparseInstance inst = new SparseInstance(1.0, values, indexes, 50000);
inst.setDataset(instancesData);
if (trainingMode && labelsFVDoc[iDoc].multiLabels[i].num > 0)
for (int j1 = 0; j1 < labelsFVDoc[iDoc].multiLabels[i].num; ++j1) {
inst.setClassValue((labelsFVDoc[iDoc].multiLabels[i].labels[j1])); // label
// >0
instancesData.add(inst);
}
else {
inst.setClassValue("-1"); // set label as -1 for null
instancesData.add(inst);
}
}
}
return;
}
private List<Instance> myExtractKeyphrases(String document, int numOfPhrases) throws Exception {
// Check whether there is actually any data
//
if (document.length() == 0 || document.equals("")) {
throw new Exception("Couldn't find any data!");
}
FastVector atts = new FastVector(3);
atts.addElement(new Attribute("doc", (FastVector) null));
atts.addElement(new Attribute("keyphrases", (FastVector) null));
Instances data = new Instances("keyphrase_training_data", atts, 0);
List<Instance> myInstances = new ArrayList<Instance>();
double[] newInst = new double[2];
newInst[0] = (double) data.attribute(0).addStringValue(document);
newInst[1] = Instance.missingValue();
data.add(new Instance(1.0, newInst));
m_KEAFilter.input(data.instance(0));
data = data.stringFreeStructure();
ke.setNumPhrases(numOfPhrases);
int numPhrases = numOfPhrases; // ke.getNumPhrases();
Instance[] topRankedInstances = new Instance[numPhrases];
Instance inst;
// Iterating over all extracted keyphrases (inst)
while ((inst = m_KEAFilter.output()) != null) {
int index = (int) inst.value(m_KEAFilter.getRankIndex()) - 1;
if (index < numPhrases) {
topRankedInstances[index] = inst;
}
}
double numExtracted = 0, numCorrect = 0;
for (int i = 0; i < numPhrases; i++) {
if (topRankedInstances[i] != null) {
if (!topRankedInstances[i].isMissing(topRankedInstances[i].numAttributes() - 1)) {
numExtracted += 1.0;
}
if ((int) topRankedInstances[i].value(topRankedInstances[i].numAttributes() - 1) == 1) {
numCorrect += 1.0;
}
myInstances.add(topRankedInstances[i]);
}
}
return myInstances;
}
public FastVector buildCosineAttributes() {
FastVector attributes = new FastVector(2);
attributes.addElement(new Attribute("cosine"));
FastVector classVal = new FastVector();
classVal.addElement("1");
classVal.addElement("0");
Attribute label = new Attribute("label", classVal);
attributes.addElement(label);
return attributes;
}
/** 构造分类器，主要及时对数据格式，类标，类别数目等进行说明 */
public MessageClassify() throws Exception {
String nameOfDataset = "MessageClassification";
FastVector attributes = new FastVector(2);
attributes.addElement(new Attribute("Message", (FastVector) null));
FastVector classValues = new FastVector(2); // 类标向量，共有两类
classValues.addElement("0");
classValues.addElement("1");
attributes.addElement(new Attribute("Class", classValues));
instances = new Instances(nameOfDataset, attributes, 100); // 可以把instance认为是行，attribute认为是列
instances.setClassIndex(instances.numAttributes() - 1); // 类表在instance中的那列
}
/**
* Determines the output format based on the input format and returns this. In case the output
* format cannot be returned immediately, i.e., immediateOutputFormat() returns false, then this
* method will be called from batchFinished().
*
* @param inputFormat the input format to base the output format on
* @return the output format
* @throws Exception in case the determination goes wrong
* @see #hasImmediateOutputFormat()
* @see #batchFinished()
*/
protected Instances determineOutputFormat(Instances inputFormat) throws Exception {
Instances data;
Instances result;
FastVector atts;
FastVector values;
HashSet hash;
int i;
int n;
boolean isDate;
Instance inst;
Vector sorted;
m_Cols.setUpper(inputFormat.numAttributes() - 1);
data = new Instances(inputFormat);
atts = new FastVector();
for (i = 0; i < data.numAttributes(); i++) {
if (!m_Cols.isInRange(i) || !data.attribute(i).isNumeric()) {
atts.addElement(data.attribute(i));
continue;
}
// date attribute?
isDate = (data.attribute(i).type() == Attribute.DATE);
// determine all available attribtues in dataset
hash = new HashSet();
for (n = 0; n < data.numInstances(); n++) {
inst = data.instance(n);
if (inst.isMissing(i)) continue;
if (isDate) hash.add(inst.stringValue(i));
else hash.add(new Double(inst.value(i)));
}
// sort values
sorted = new Vector();
for (Object o : hash) sorted.add(o);
Collections.sort(sorted);
// create attribute from sorted values
values = new FastVector();
for (Object o : sorted) {
if (isDate) values.addElement(o.toString());
else values.addElement(Utils.doubleToString(((Double) o).doubleValue(), MAX_DECIMALS));
}
atts.addElement(new Attribute(data.attribute(i).name(), values));
}
result = new Instances(inputFormat.relationName(), atts, 0);
result.setClassIndex(inputFormat.classIndex());
return result;
}
private static Instances createSet(int l) {
FastVector attributes = new FastVector(1 + l);
FastVector vals = new FastVector(3);
vals.addElement("S1");
vals.addElement("S2");
vals.addElement("S3");
Attribute classAttribute = new Attribute("Sense", vals);
attributes.addElement(classAttribute);
for (int i = 0; i < l; i++) {
attributes.addElement(new Attribute(i + 1 + ""));
}
Instances set = new Instances("Rel", attributes, 1 + l);
set.setClassIndex(0);
return set;
}
private static Instances convertToInstances(
final IScope scope,
final IList<String> attributes,
final IAddressableContainer<Integer, IAgent, Integer, IAgent> agents)
throws GamaRuntimeException {
FastVector attribs = new FastVector();
for (String att : attributes) {
attribs.addElement(new Attribute(att));
}
Instances dataset =
new Instances(scope.getAgentScope().getName(), attribs, agents.length(scope));
for (IAgent ag : agents.iterable(scope)) {
int nb = attributes.size();
double vals[] = new double[nb];
for (int i = 0; i < nb; i++) {
String attrib = attributes.get(i);
Double var = Cast.asFloat(scope, ag.getDirectVarValue(scope, attrib));
vals[i] = var;
}
Instance instance = new Instance(1, vals);
dataset.add(instance);
}
return dataset;
}
public weka.core.Instances toWekaInstances() {
// attributes
FastVector wattrs = new FastVector();
Iterator itr = attributes.iterator();
while (itr.hasNext()) {
Attribute attr = (Attribute) itr.next();
wattrs.addElement(attr.toWekaAttribute());
}
// data instances
weka.core.Instances winsts = new weka.core.Instances(name, wattrs, instances.size());
itr = instances.iterator();
while (itr.hasNext()) {
Instance inst = (Instance) itr.next();
Iterator itrval = inst.getValues().iterator();
Iterator itrmis = inst.getMissing().iterator();
double[] vals = new double[wattrs.size()];
for (int i = 0; i < wattrs.size(); i++) {
double val = (Double) itrval.next();
if ((Boolean) itrmis.next()) {
vals[i] = weka.core.Instance.missingValue();
} else {
vals[i] = val;
}
}
weka.core.Instance winst = new weka.core.Instance(1, vals);
winst.setDataset(winsts);
winsts.add(winst);
}
winsts.setClassIndex(this.class_index);
return winsts;
}
/**
* Returns an enumeration describing the available options.
*
* @return an enumeration of all the available options.
*/
public Enumeration listOptions() {
String string1 = "\tThe required number of rules. (default = " + (m_numRules - 5) + ")";
FastVector newVector = new FastVector(1);
newVector.addElement(new Option(string1, "N", 1, "-N <required number of rules output>"));
return newVector.elements();
}
/**
* Determines the output format based on the input format and returns this.
*
* @param inputFormat the input format to base the output format on
* @return the output format
* @throws Exception in case the determination goes wrong
*/
protected Instances determineOutputFormat(Instances inputFormat) throws Exception {
Instances result;
Attribute att;
Attribute attSorted;
FastVector atts;
FastVector values;
Vector<String> sorted;
int i;
int n;
m_AttributeIndices.setUpper(inputFormat.numAttributes() - 1);
// determine sorted indices
atts = new FastVector();
m_NewOrder = new int[inputFormat.numAttributes()][];
for (i = 0; i < inputFormat.numAttributes(); i++) {
att = inputFormat.attribute(i);
if (!att.isNominal() || !m_AttributeIndices.isInRange(i)) {
m_NewOrder[i] = new int[0];
atts.addElement(inputFormat.attribute(i).copy());
continue;
}
// sort labels
sorted = new Vector<String>();
for (n = 0; n < att.numValues(); n++) sorted.add(att.value(n));
Collections.sort(sorted, m_Comparator);
// determine new indices
m_NewOrder[i] = new int[att.numValues()];
values = new FastVector();
for (n = 0; n < att.numValues(); n++) {
m_NewOrder[i][n] = sorted.indexOf(att.value(n));
values.addElement(sorted.get(n));
}
attSorted = new Attribute(att.name(), values);
attSorted.setWeight(att.weight());
atts.addElement(attSorted);
}
// generate new header
result = new Instances(inputFormat.relationName(), atts, 0);
result.setClassIndex(inputFormat.classIndex());
return result;
}
private FastVector attFromStream(StreamElement data) {
FastVector fv = new FastVector();
for (int i = 0; i < data.getFieldNames().length; i++) {
Attribute a = new Attribute(data.getFieldNames()[i]);
fv.addElement(a);
}
return fv;
}
/**
* Process a classifier's prediction for an instance and update a set of plotting instances and
* additional plotting info. m_PlotShape for nominal class datasets holds shape types (actual data
* points have automatic shape type assignment; classifier error data points have box shape type).
* For numeric class datasets, the actual data points are stored in m_PlotInstances and m_PlotSize
* stores the error (which is later converted to shape size values).
*
* @param toPredict the actual data point
* @param classifier the classifier
* @param eval the evaluation object to use for evaluating the classifier on the instance to
* predict
* @see #m_PlotShapes
* @see #m_PlotSizes
* @see #m_PlotInstances
*/
public void process(Instance toPredict, Classifier classifier, Evaluation eval) {
double pred;
double[] values;
int i;
try {
pred = eval.evaluateModelOnceAndRecordPrediction(classifier, toPredict);
if (classifier instanceof weka.classifiers.misc.InputMappedClassifier) {
toPredict =
((weka.classifiers.misc.InputMappedClassifier) classifier)
.constructMappedInstance(toPredict);
}
if (!m_SaveForVisualization) return;
if (m_PlotInstances != null) {
values = new double[m_PlotInstances.numAttributes()];
for (i = 0; i < m_PlotInstances.numAttributes(); i++) {
if (i < toPredict.classIndex()) {
values[i] = toPredict.value(i);
} else if (i == toPredict.classIndex()) {
values[i] = pred;
values[i + 1] = toPredict.value(i);
i++;
} else {
values[i] = toPredict.value(i - 1);
}
}
m_PlotInstances.add(new DenseInstance(1.0, values));
if (toPredict.classAttribute().isNominal()) {
if (toPredict.isMissing(toPredict.classIndex()) || Utils.isMissingValue(pred)) {
m_PlotShapes.addElement(new Integer(Plot2D.MISSING_SHAPE));
} else if (pred != toPredict.classValue()) {
// set to default error point shape
m_PlotShapes.addElement(new Integer(Plot2D.ERROR_SHAPE));
} else {
// otherwise set to constant (automatically assigned) point shape
m_PlotShapes.addElement(new Integer(Plot2D.CONST_AUTOMATIC_SHAPE));
}
m_PlotSizes.addElement(new Integer(Plot2D.DEFAULT_SHAPE_SIZE));
} else {
// store the error (to be converted to a point size later)
Double errd = null;
if (!toPredict.isMissing(toPredict.classIndex()) && !Utils.isMissingValue(pred)) {
errd = new Double(pred - toPredict.classValue());
m_PlotShapes.addElement(new Integer(Plot2D.CONST_AUTOMATIC_SHAPE));
} else {
// missing shape if actual class not present or prediction is missing
m_PlotShapes.addElement(new Integer(Plot2D.MISSING_SHAPE));
}
m_PlotSizes.addElement(errd);
}
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
/**
* Add a rule to the ruleset and update the stats
*
* @param lastRule the rule to be added
*/
public void addAndUpdate(Rule lastRule) {
if (m_Ruleset == null) m_Ruleset = new FastVector();
m_Ruleset.addElement(lastRule);
Instances data = (m_Filtered == null) ? m_Data : ((Instances[]) m_Filtered.lastElement())[1];
double[] stats = new double[6];
double[] classCounts = new double[m_Data.classAttribute().numValues()];
Instances[] filtered = computeSimpleStats(m_Ruleset.size() - 1, data, stats, classCounts);
if (m_Filtered == null) m_Filtered = new FastVector();
m_Filtered.addElement(filtered);
if (m_SimpleStats == null) m_SimpleStats = new FastVector();
m_SimpleStats.addElement(stats);
if (m_Distributions == null) m_Distributions = new FastVector();
m_Distributions.addElement(classCounts);
}
/**
* Trains the classifier on the array of Signal objects. Implementations of this method should
* also produce an ordered list of the class names which can be returned with the <code>
* getClassNames</code> method.
*
* @param inputData the Signal array that the model should be trained on.
* @throws noMetadataException Thrown if there is no class metadata to train the Gaussian model
* with
*/
public void train(Signal[] inputData) {
List classNamesList = new ArrayList();
for (int i = 0; i < inputData.length; i++) {
try {
String className = inputData[i].getStringMetadata(Signal.PROP_CLASS);
if ((className != null) && (!classNamesList.contains(className))) {
classNamesList.add(className);
}
} catch (noMetadataException ex) {
throw new RuntimeException("No class metadata found to train model on!", ex);
}
}
Collections.sort(classNamesList);
classnames = (String[]) classNamesList.toArray(new String[classNamesList.size()]);
FastVector classValues = new FastVector(classnames.length);
for (int i = 0; i < classnames.length; i++) {
classValues.addElement(classnames[i]);
}
classAttribute = new Attribute(Signal.PROP_CLASS, classValues);
Instances trainingDataSet =
new Instances(Signal2Instance.convert(inputData[0], classAttribute));
if (inputData.length > 1) {
for (int i = 1; i < inputData.length; i++) {
Instances aSignalInstance = Signal2Instance.convert(inputData[i], classAttribute);
for (int j = 0; j < aSignalInstance.numInstances(); j++)
trainingDataSet.add(aSignalInstance.instance(j));
}
}
trainingDataSet.setClass(classAttribute);
inputData = null;
theRule = new MISMO();
// parse options
StringTokenizer stOption = new StringTokenizer(this.MISMOOptions, " ");
String[] options = new String[stOption.countTokens()];
for (int i = 0; i < options.length; i++) {
options[i] = stOption.nextToken();
}
try {
theRule.setOptions(options);
} catch (Exception ex) {
throw new RuntimeException("Failed to set MISMO classifier options!", ex);
}
try {
theRule.buildClassifier(trainingDataSet);
System.out.println("WEKA: outputting MISMO classifier; " + theRule.globalInfo());
} catch (Exception ex) {
throw new RuntimeException("Failed to train classifier!", ex);
}
}
/**
* Filter the data according to the ruleset and compute the basic stats: coverage/uncoverage,
* true/false positive/negatives of each rule
*/
public void countData() {
if ((m_Filtered != null) || (m_Ruleset == null) || (m_Data == null)) return;
int size = m_Ruleset.size();
m_Filtered = new FastVector(size);
m_SimpleStats = new FastVector(size);
m_Distributions = new FastVector(size);
Instances data = new Instances(m_Data);
for (int i = 0; i < size; i++) {
double[] stats = new double[6]; // 6 statistics parameters
double[] classCounts = new double[m_Data.classAttribute().numValues()];
Instances[] filtered = computeSimpleStats(i, data, stats, classCounts);
m_Filtered.addElement(filtered);
m_SimpleStats.addElement(stats);
m_Distributions.addElement(classCounts);
data = filtered[1]; // Data not covered
}
}
/** Set the output format. Changes the format of the specified date attribute. */
private void setOutputFormat() {
// Create new attributes
FastVector newAtts = new FastVector(getInputFormat().numAttributes());
for (int j = 0; j < getInputFormat().numAttributes(); j++) {
Attribute att = getInputFormat().attribute(j);
if (j == m_AttIndex.getIndex()) {
newAtts.addElement(new Attribute(att.name(), getDateFormat().toPattern()));
} else {
newAtts.addElement(att.copy());
}
}
// Create new header
Instances newData = new Instances(getInputFormat().relationName(), newAtts, 0);
newData.setClassIndex(getInputFormat().classIndex());
m_OutputAttribute = newData.attribute(m_AttIndex.getIndex());
setOutputFormat(newData);
}
/**
* Set the output format. Takes the current average class values and m_InputFormat and calls
* setOutputFormat(Instances) appropriately.
*/
private void setOutputFormat() {
Instances newData;
FastVector newAtts;
// Compute new attributes
newAtts = new FastVector(getInputFormat().numAttributes());
for (int j = 0; j < getInputFormat().numAttributes(); j++) {
Attribute att = getInputFormat().attribute(j);
if (!att.isNominal() || !m_AttIndex.isInRange(j)) newAtts.addElement(att);
else newAtts.addElement(new Attribute(att.name(), (FastVector) null));
}
// Construct new header
newData = new Instances(getInputFormat().relationName(), newAtts, 0);
newData.setClassIndex(getInputFormat().classIndex());
setOutputFormat(newData);
}
private static Instances initializeAttributes() {
String nameOfDataset = "Badges";
Instances instances;
FastVector attributes = new FastVector(9);
for (String featureName : features) {
attributes.addElement(new Attribute(featureName, zeroOne));
}
Attribute classLabel = new Attribute("Class", labels);
// labels is a FastVector of '+' and '-'
attributes.addElement(classLabel);
instances = new Instances(nameOfDataset, attributes, 0);
instances.setClass(classLabel);
return instances;
}
private void initialiseRelation() {
minAttribute = new Attribute("min");
maxAttribute = new Attribute("max");
meanAttribute = new Attribute("mean");
stdDevAttribute = new Attribute("stdDev");
FastVector activities = new FastVector(2);
activities.addElement("walking");
activities.addElement("running");
activityAttribute = new Attribute("activity", activities);
FastVector features = new FastVector(NUMBER_OF_ATTRIBUTES);
features.addElement(minAttribute);
features.addElement(maxAttribute);
features.addElement(meanAttribute);
features.addElement(stdDevAttribute);
features.addElement(activityAttribute);
instances = new Instances("Activity", features, 0);
loadExistingData();
}
/**
* Determines the output format based on the input format and returns this. In case the output
* format cannot be returned immediately, i.e., hasImmediateOutputFormat() returns false, then
* this method will called from batchFinished() after the call of preprocess(Instances), in which,
* e.g., statistics for the actual processing step can be gathered.
*
* @param inputFormat the input format to base the output format on
* @return the output format
* @throws Exception in case the determination goes wrong
*/
protected Instances determineOutputFormat(Instances inputFormat) throws Exception {
Instances result;
FastVector atts;
int i;
int numAtts;
Vector<Integer> indices;
Vector<Integer> subset;
Random rand;
int index;
// determine the number of attributes
numAtts = inputFormat.numAttributes();
if (inputFormat.classIndex() > -1) numAtts--;
if (m_NumAttributes < 1) {
numAtts = (int) Math.round((double) numAtts * m_NumAttributes);
} else {
if (m_NumAttributes < numAtts) numAtts = (int) m_NumAttributes;
}
if (getDebug()) System.out.println("# of atts: " + numAtts);
// determine random indices
indices = new Vector<Integer>();
for (i = 0; i < inputFormat.numAttributes(); i++) {
if (i == inputFormat.classIndex()) continue;
indices.add(i);
}
subset = new Vector<Integer>();
rand = new Random(m_Seed);
for (i = 0; i < numAtts; i++) {
index = rand.nextInt(indices.size());
subset.add(indices.get(index));
indices.remove(index);
}
Collections.sort(subset);
if (inputFormat.classIndex() > -1) subset.add(inputFormat.classIndex());
if (getDebug()) System.out.println("indices: " + subset);
// generate output format
atts = new FastVector();
m_Indices = new int[subset.size()];
for (i = 0; i < subset.size(); i++) {
atts.addElement(inputFormat.attribute(subset.get(i)));
m_Indices[i] = subset.get(i);
}
result = new Instances(inputFormat.relationName(), atts, 0);
if (inputFormat.classIndex() > -1) result.setClassIndex(result.numAttributes() - 1);
return result;
}
static {
features = new String[] {"firstName", "lastName"};
List<String> ff = new ArrayList<String>();
for (String f : features) {
for (int i = 0; i < 9; i++) {
for (char letter = 'a'; letter <= 'z'; letter++) {
ff.add(f + i + "=" + letter);
}
}
}
features = ff.toArray(new String[ff.size()]);
zeroOne = new FastVector(2);
zeroOne.addElement("1");
zeroOne.addElement("0");
labels = new FastVector(2);
labels.addElement("+");
labels.addElement("-");
}
/**
* Count data from the position index in the ruleset assuming that given data are not covered by
* the rules in position 0...(index-1), and the statistics of these rules are provided.<br>
* This procedure is typically useful when a temporary object of RuleStats is constructed in order
* to efficiently calculate the relative DL of rule in position index, thus all other stuff is not
* needed.
*
* @param index the given position
* @param uncovered the data not covered by rules before index
* @param prevRuleStats the provided stats of previous rules
*/
public void countData(int index, Instances uncovered, double[][] prevRuleStats) {
if ((m_Filtered != null) || (m_Ruleset == null)) return;
int size = m_Ruleset.size();
m_Filtered = new FastVector(size);
m_SimpleStats = new FastVector(size);
Instances[] data = new Instances[2];
data[1] = uncovered;
for (int i = 0; i < index; i++) {
m_SimpleStats.addElement(prevRuleStats[i]);
if (i + 1 == index) m_Filtered.addElement(data);
else m_Filtered.addElement(new Object()); // Stuff sth.
}
for (int j = index; j < size; j++) {
double[] stats = new double[6]; // 6 statistics parameters
Instances[] filtered = computeSimpleStats(j, data[1], stats, null);
m_Filtered.addElement(filtered);
m_SimpleStats.addElement(stats);
data = filtered; // Data not covered
}
}
public void init() {
// 1. set up attributes
attributes = new FastVector();
// - numeric: 1
attributes.addElement(new Attribute("IsMarket"));
// - numeric: 2
attributes.addElement(new Attribute("IsMonth"));
// - numeric: 3
attributes.addElement(new Attribute("IsCategory"));
// - numeric: 4
attributes.addElement(new Attribute("IsCompany"));
// - numeric: 5
attributes.addElement(new Attribute("IsBrand"));
// - numeric: 5
attributes.addElement(new Attribute("OfferValue"));
// - nominal: 6
attributeReturn = new FastVector();
attributeReturn.addElement("f");
attributeReturn.addElement("t");
attributes.addElement(new Attribute("Return", attributeReturn));
}
/**
* Parses a given list of options. Valid options are:
*
* <p>-D <br>
* Turn on debugging output.
*
* <p>-S seed <br>
* Random number seed (default 1).
*
* <p>-B classifierstring <br>
* Classifierstring should contain the full class name of a scheme included for selection followed
* by options to the classifier (required, option should be used once for each classifier).
*
* <p>-X num_folds <br>
* Use cross validation error as the basis for classifier selection. (default 0, is to use error
* on the training data instead)
*
* <p>
*
* @param options the list of options as an array of strings
* @exception Exception if an option is not supported
*/
public void setOptions(String[] options) throws Exception {
setDebug(Utils.getFlag('D', options));
String numFoldsString = Utils.getOption('X', options);
if (numFoldsString.length() != 0) {
setNumFolds(Integer.parseInt(numFoldsString));
} else {
setNumFolds(0);
}
String randomString = Utils.getOption('S', options);
if (randomString.length() != 0) {
setSeed(Integer.parseInt(randomString));
} else {
setSeed(1);
}
// Iterate through the schemes
FastVector classifiers = new FastVector();
while (true) {
String classifierString = Utils.getOption('B', options);
if (classifierString.length() == 0) {
break;
}
String[] classifierSpec = Utils.splitOptions(classifierString);
if (classifierSpec.length == 0) {
throw new Exception("Invalid classifier specification string");
}
String classifierName = classifierSpec[0];
classifierSpec[0] = "";
classifiers.addElement(Classifier.forName(classifierName, classifierSpec));
}
if (classifiers.size() <= 1) {
throw new Exception("At least two classifiers must be specified" + " with the -B option.");
} else {
Classifier[] classifiersArray = new Classifier[classifiers.size()];
for (int i = 0; i < classifiersArray.length; i++) {
classifiersArray[i] = (Classifier) classifiers.elementAt(i);
}
setClassifiers(classifiersArray);
}
}
public boolean batchFinished() throws Exception {
Instances input = getInputFormat();
String relation = input.relationName();
Instances output = new Instances(relation);
int numAttributes = input.numAttributes();
int numInstances = input.numInstances();
for (int i = 0; i < numAttributes; i++) {
FastVector vector = new FastVector();
for (int j = 0; j < numInstances; j++) {
double value = input.instance(j).value(i);
String string = String.valueOf(value);
if (vector.indexOf(string) == -1) vector.addElement(string);
}
Attribute attribute = new Attribute(input.attribute(i).name(), vector);
output.appendAttribute(attribute);
}
setOutputFormat(output);
for (int i = 0; i < numInstances; i++) push(input.instance(i));
return super.batchFinished();
}