public Instances transformInstances(MultiLabelInstances mlData) throws Exception {
labelIndices = mlData.getLabelIndices();
numOfLabels = mlData.getNumLabels();
Instances data = mlData.getDataSet();
Instances transformed = new Instances(mlData.getDataSet(), 0);
// delete all labels
transformed = RemoveAllLabels.transformInstances(transformed, labelIndices);
// add single label attribute
ArrayList<String> classValues = new ArrayList<String>(numOfLabels);
for (int x = 0; x < numOfLabels; x++) {
classValues.add("Class" + (x + 1));
}
Attribute newClass = new Attribute("Class", classValues);
transformed.insertAttributeAt(newClass, transformed.numAttributes());
transformed.setClassIndex(transformed.numAttributes() - 1);
for (int instanceIndex = 0; instanceIndex < data.numInstances(); instanceIndex++) {
// System.out.println(data.instance(instanceIndex).toString());
List<Instance> result = transformInstance(data.instance(instanceIndex));
for (Instance instance : result) {
// System.out.println(instance.toString());
transformed.add(instance);
// System.out.println(transformed.instance(transformed.numInstances()-1));
}
}
return transformed;
}
@Override
protected Instances process(Instances instances) throws Exception {
instances.insertAttributeAt(getIndicatorAttribute(), instances.numAttributes() - 1);
if (m_FirstBatchDone == false) {
searchMedian(instances);
}
imputeMedian(instances);
return instances;
}
/**
* processes the instances using the HAAR algorithm
*
* @param instances the data to process
* @return the modified data
* @throws Exception in case the processing goes wrong
*/
protected Instances processHAAR(Instances instances) throws Exception {
Instances result;
int i;
int n;
int j;
int clsIdx;
double[] oldVal;
double[] newVal;
int level;
int length;
double[] clsVal;
Attribute clsAtt;
clsIdx = instances.classIndex();
clsVal = null;
clsAtt = null;
if (clsIdx > -1) {
clsVal = instances.attributeToDoubleArray(clsIdx);
clsAtt = (Attribute) instances.classAttribute().copy();
instances.setClassIndex(-1);
instances.deleteAttributeAt(clsIdx);
}
result = new Instances(instances, 0);
level = (int) StrictMath.ceil(StrictMath.log(instances.numAttributes()) / StrictMath.log(2.0));
for (i = 0; i < instances.numInstances(); i++) {
oldVal = instances.instance(i).toDoubleArray();
newVal = new double[oldVal.length];
for (n = level; n > 0; n--) {
length = (int) StrictMath.pow(2, n - 1);
for (j = 0; j < length; j++) {
newVal[j] = (oldVal[j * 2] + oldVal[j * 2 + 1]) / StrictMath.sqrt(2);
newVal[j + length] = (oldVal[j * 2] - oldVal[j * 2 + 1]) / StrictMath.sqrt(2);
}
System.arraycopy(newVal, 0, oldVal, 0, newVal.length);
}
// add new transformed instance
result.add(new DenseInstance(1, newVal));
}
// add class again
if (clsIdx > -1) {
result.insertAttributeAt(clsAtt, clsIdx);
result.setClassIndex(clsIdx);
for (i = 0; i < clsVal.length; i++) result.instance(i).setClassValue(clsVal[i]);
}
return result;
}
/**
* Sets the format of the input instances.
*
* @param instanceInfo an Instances object containing the input instance structure (any instances
* contained in the object are ignored - only the structure is required).
* @return true if the outputFormat may be collected immediately
* @exception Exception if the format couldn't be set successfully
*/
public boolean setInputFormat(Instances instanceInfo) throws Exception {
convertInfixToPostfix(new String(m_infixExpression));
super.setInputFormat(instanceInfo);
Instances outputFormat = new Instances(instanceInfo, 0);
Attribute newAttribute;
if (m_Debug) {
newAttribute = new Attribute(m_postFixExpVector.toString());
} else if (m_attributeName.compareTo("expression") != 0) {
newAttribute = new Attribute(m_attributeName);
} else {
newAttribute = new Attribute(m_infixExpression);
}
outputFormat.insertAttributeAt(newAttribute, instanceInfo.numAttributes());
setOutputFormat(outputFormat);
return true;
}
/**
* Sets the format of the input instances.
*
* @param instanceInfo an Instances object containing the input instance structure (any instances
* contained in the object are ignored - only the structure is required).
* @return true if the outputFormat may be collected immediately
* @throws Exception if the format couldn't be set successfully
*/
public boolean setInputFormat(Instances instanceInfo) throws Exception {
super.setInputFormat(instanceInfo);
m_Insert.setUpper(instanceInfo.numAttributes());
Instances outputFormat = new Instances(instanceInfo, 0);
Attribute newAttribute = null;
switch (m_AttributeType) {
case Attribute.NUMERIC:
newAttribute = new Attribute(m_Name);
break;
case Attribute.NOMINAL:
newAttribute = new Attribute(m_Name, m_Labels);
break;
case Attribute.STRING:
newAttribute = new Attribute(m_Name, (FastVector) null);
break;
case Attribute.DATE:
newAttribute = new Attribute(m_Name, m_DateFormat);
break;
default:
throw new IllegalArgumentException("Unknown attribute type in Add");
}
if ((m_Insert.getIndex() < 0) || (m_Insert.getIndex() > getInputFormat().numAttributes())) {
throw new IllegalArgumentException("Index out of range");
}
outputFormat.insertAttributeAt(newAttribute, m_Insert.getIndex());
setOutputFormat(outputFormat);
// all attributes, except index of added attribute
// (otherwise the length of the input/output indices differ)
Range atts = new Range(m_Insert.getSingleIndex());
atts.setInvert(true);
atts.setUpper(outputFormat.numAttributes() - 1);
initOutputLocators(outputFormat, atts.getSelection());
return true;
}
/**
* pads the data to conform to the necessary number of attributes
*
* @param data the data to pad
* @return the padded data
*/
protected Instances pad(Instances data) {
Instances result;
int i;
int n;
String prefix;
int numAtts;
boolean isLast;
int index;
Vector<Integer> padded;
int[] indices;
FastVector atts;
// determine number of padding attributes
switch (m_Padding) {
case PADDING_ZERO:
if (data.classIndex() > -1)
numAtts = (nextPowerOf2(data.numAttributes() - 1) + 1) - data.numAttributes();
else numAtts = nextPowerOf2(data.numAttributes()) - data.numAttributes();
break;
default:
throw new IllegalStateException(
"Padding " + new SelectedTag(m_Algorithm, TAGS_PADDING) + " not implemented!");
}
result = new Instances(data);
prefix = getAlgorithm().getSelectedTag().getReadable();
// any padding necessary?
if (numAtts > 0) {
// add padding attributes
isLast = (data.classIndex() == data.numAttributes() - 1);
padded = new Vector<Integer>();
for (i = 0; i < numAtts; i++) {
if (isLast) index = result.numAttributes() - 1;
else index = result.numAttributes();
result.insertAttributeAt(new Attribute(prefix + "_padding_" + (i + 1)), index);
// record index
padded.add(new Integer(index));
}
// get padded indices
indices = new int[padded.size()];
for (i = 0; i < padded.size(); i++) indices[i] = padded.get(i);
// determine number of padding attributes
switch (m_Padding) {
case PADDING_ZERO:
for (i = 0; i < result.numInstances(); i++) {
for (n = 0; n < indices.length; n++) result.instance(i).setValue(indices[n], 0);
}
break;
}
}
// rename all attributes apart from class
data = result;
atts = new FastVector();
n = 0;
for (i = 0; i < data.numAttributes(); i++) {
n++;
if (i == data.classIndex()) atts.addElement((Attribute) data.attribute(i).copy());
else atts.addElement(new Attribute(prefix + "_" + n));
}
// create new dataset
result = new Instances(data.relationName(), atts, data.numInstances());
result.setClassIndex(data.classIndex());
for (i = 0; i < data.numInstances(); i++)
result.add(new DenseInstance(1.0, data.instance(i).toDoubleArray()));
return result;
}
public void generateDataSet() {
// Read all the instances in the file (ARFF, CSV, XRFF, ...)
try {
source = new DataSource("data\\bne.csv");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Create data set
try {
instances = source.getDataSet();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Reverse the order of instances in the data set to place them in
// chronological order
for (int i = 0; i < (instances.numInstances() / 2); i++) {
instances.swap(i, instances.numInstances() - 1 - i);
}
// Remove "volume", "low price", "high price", "opening price" and
// "data" from data set
instances.deleteAttributeAt(instances.numAttributes() - 1);
instances.deleteAttributeAt(instances.numAttributes() - 2);
instances.deleteAttributeAt(instances.numAttributes() - 2);
instances.deleteAttributeAt(instances.numAttributes() - 2);
instances.deleteAttributeAt(instances.numAttributes() - 2);
// Create list to hold nominal values "purchase", "sale", "retain"
List my_nominal_values = new ArrayList(3);
my_nominal_values.add("purchase");
my_nominal_values.add("sale");
my_nominal_values.add("retain");
// Create nominal attribute "classIndex"
Attribute classIndex = new Attribute("classIndex", my_nominal_values);
// Add "classIndex" as an attribute to each instance
instances.insertAttributeAt(classIndex, instances.numAttributes());
// Set the value of "classIndex" for each instance
for (int i = 0; i < instances.numInstances() - 1; i++) {
if (instances.get(i + 1).value(instances.numAttributes() - 2)
> instances.get(i).value(instances.numAttributes() - 2)) {
instances.get(i).setValue(instances.numAttributes() - 1, "purchase");
} else if (instances.get(i + 1).value(instances.numAttributes() - 2)
< instances.get(i).value(instances.numAttributes() - 2)) {
instances.get(i).setValue(instances.numAttributes() - 1, "sale");
} else if (instances.get(i + 1).value(instances.numAttributes() - 2)
== instances.get(i).value(instances.numAttributes() - 2)) {
instances.get(i).setValue(instances.numAttributes() - 1, "retain");
}
}
// Make the last attribute be the class
instances.setClassIndex(instances.numAttributes() - 1);
// Calculate and insert technical analysis attributes into data set
Strategies strategies = new Strategies();
strategies.applyStrategies();
// Print header and instances
System.out.println("\nDataset:\n");
System.out.println(instances);
System.out.println(instances.numInstances());
}
/**
* ************************************************** Convert a table to a set of instances, with
* <b>columns</b> representing individual </b>instances</b> and <b>rows</b> representing
* <b>attributes</b> (e.g. as is common with microarray data)
*/
public Instances tableColsToInstances(Table t, String relationName) {
System.err.print("Converting table cols to instances...");
// Set up attributes, which for colInstances will be the rowNames...
FastVector atts = new FastVector();
ArrayList<Boolean> isNominal = new ArrayList<Boolean>();
ArrayList<FastVector> allAttVals = new ArrayList<FastVector>(); // Save values for later...
System.err.print("creating attributes...");
for (int r = 0; r < t.numRows; r++) {
if (rowIsNumeric(t, r)) {
isNominal.add(false);
atts.addElement(new Attribute(t.rowNames[r]));
allAttVals.add(null); // No enumeration of attribute values.
} else {
// It's nominal... determine the range of values and create a nominal attribute...
isNominal.add(true);
FastVector attVals = getRowValues(t, r);
atts.addElement(new Attribute(t.rowNames[r], attVals));
// Save it for later
allAttVals.add(attVals);
}
}
System.err.print("creating instances...");
// Create Instances object..
Instances data = new Instances(relationName, atts, 0);
data.setRelationName(relationName);
/** ***** CREATE INSTANCES ************* */
// Fill the instances with data...
// For each instance...
for (int c = 0; c < t.numCols; c++) {
double[] vals =
new double[data.numAttributes()]; // Even nominal values are stored as double pointers.
// For each attribute fill in the numeric or attributeValue index...
for (int r = 0; r < t.numRows; r++) {
String val = (String) t.matrix.getQuick(r, c);
if (val == "?") vals[r] = Instance.missingValue();
else if (isNominal.get(r)) {
vals[r] = allAttVals.get(r).indexOf(val);
} else {
vals[r] = Double.parseDouble((String) val);
}
}
// Add the a newly minted instance with those attribute values...
data.add(new Instance(1.0, vals));
}
System.err.print("add feature names...");
/** ***** ADD FEATURE NAMES ************* */
// takes basically zero time... all time is in previous 2 chunks.
if (addInstanceNamesAsFeatures) {
Instances newData = new Instances(data);
newData.insertAttributeAt(new Attribute("ID", (FastVector) null), 0);
int attrIdx = newData.attribute("ID").index(); // Paranoid... should be 0
// We save the instanceNames in a list because it's handy later on...
instanceNames = new ArrayList<String>();
for (int c = 0; c < t.colNames.length; c++) {
instanceNames.add(t.colNames[c]);
newData.instance(c).setValue(attrIdx, t.colNames[c]);
}
data = newData;
}
System.err.println("done.");
return (data);
}
/**
* ************************************************** Convert a table to a set of instances, with
* <b>rows</b> representing individual </b>instances</b> and <b>columns</b> representing
* <b>attributes</b>
*/
public Instances tableRowsToNominalInstances(Table t, String relationName) {
System.err.print("Converting table rows to instances...");
// Set up attributes, which for rowInstances will be the colNames...
FastVector atts = new FastVector();
ArrayList<Boolean> isNominal = new ArrayList<Boolean>();
ArrayList<FastVector> allAttVals = new ArrayList<FastVector>(); // Save values for later...
System.err.print("creating attributes...");
for (int c = 0; c < t.numCols; c++) {
// It's nominal... determine the range of values
isNominal.add(true);
FastVector attVals = getColValues(t, c);
atts.addElement(new Attribute(t.colNames[c], attVals));
// Save it for later
allAttVals.add(attVals);
}
System.err.print("creating instances...");
// Create Instances object..
Instances data = new Instances(relationName, atts, 0);
data.setRelationName(relationName);
// Fill the instances with data...
// For each instance...
for (int r = 0; r < t.numRows; r++) {
double[] vals = new double[data.numAttributes()];
// for each attribute
for (int c = 0; c < t.numCols; c++) {
String val = (String) t.matrix.getQuick(r, c);
if (val == "?") vals[c] = Instance.missingValue();
else if (isNominal.get(c)) {
vals[c] = allAttVals.get(c).indexOf(val);
} else {
vals[c] = Double.parseDouble((String) val);
}
}
// Add the a newly minted instance with those attribute values...
data.add(new Instance(1.0, vals));
}
System.err.print("add feature names...");
if (addInstanceNamesAsFeatures) {
Instances newData = new Instances(data);
newData.insertAttributeAt(new Attribute("ID", (FastVector) null), 0);
int attrIdx = newData.attribute("ID").index(); // Paranoid... should be 0
// We save the instanceNames in a list because it's handy later on...
instanceNames = new ArrayList<String>();
for (int r = 0; r < t.rowNames.length; r++) {
instanceNames.add(t.rowNames[r]);
newData.instance(r).setValue(attrIdx, t.rowNames[r]);
}
data = newData;
}
System.err.println("done.");
return (data);
}
/**
* If we know in advance that the table is numeric, can optimize a lot... For example, on 9803 x
* 294 table, TableFileLoader.readNumeric takes 6s compared to 12s for WekaMine readFromTable.
*/
public static Instances readNumeric(String fileName, String relationName, String delimiter)
throws Exception {
int numAttributes = FileUtils.fastCountLines(fileName) - 1; // -1 exclude heading.
String[] attrNames = new String[numAttributes];
// Read the col headings and figure out the number of columns in the table..
BufferedReader reader = new BufferedReader(new FileReader(fileName), 4194304);
String line = reader.readLine();
String[] instanceNames = parseColNames(line, delimiter);
int numInstances = instanceNames.length;
System.err.print("reading " + numAttributes + " x " + numInstances + " table..");
// Create an array to hold the data as we read it in...
double dataArray[][] = new double[numAttributes][numInstances];
// Populate the matrix with values...
String valToken = "";
try {
int rowIdx = 0;
while ((line = reader.readLine()) != null) {
String[] tokens = line.split(delimiter, -1);
attrNames[rowIdx] = tokens[0].trim();
for (int colIdx = 0; colIdx < (tokens.length - 1); colIdx++) {
valToken = tokens[colIdx + 1];
double value;
if (valToken.equals("null")) {
value = Instance.missingValue();
} else if (valToken.equals("?")) {
value = Instance.missingValue();
} else if (valToken.equals("NA")) {
value = Instance.missingValue();
} else if (valToken.equals("")) {
value = Instance.missingValue();
// }else value = DoubleParser.lightningParse(valToken); // faster double parser with
// MANY assumptions
} else value = Double.parseDouble(valToken);
dataArray[rowIdx][colIdx] = value;
}
rowIdx++;
}
} catch (NumberFormatException e) {
System.err.println(e.toString());
System.err.println("Parsing line: " + line);
System.err.println("Parsing token: " + valToken);
}
// Set up attributes, which for colInstances will be the rowNames...
FastVector atts = new FastVector();
for (int a = 0; a < numAttributes; a++) {
atts.addElement(new Attribute(attrNames[a]));
}
// Create Instances object..
Instances data = new Instances(relationName, atts, 0);
data.setRelationName(relationName);
System.err.print("creating instances..");
// System.err.println("DEBUG: numAttributes "+numAttributes);
/** ***** CREATE INSTANCES ************* */
// Fill the instances with data...
// For each instance...
for (int c = 0; c < numInstances; c++) {
double[] vals =
new double[data.numAttributes()]; // Even nominal values are stored as double pointers.
for (int r = 0; r < numAttributes; r++) {
double val = dataArray[r][c];
vals[r] = val;
}
// Add the a newly minted instance with those attribute values...
data.add(new Instance(1.0, vals));
}
// System.err.println("DEBUG: data.numInstances: "+data.numInstances());
// System.err.println("DEBUG: data.numAttributes: "+data.numAttributes());
// System.err.println("DEBUG: data.relationNAme"+data.relationName());
System.err.print("add feature names..");
/** ***** ADD FEATURE NAMES ************* */
// takes basically zero time... all time is in previous 2 chunks.
Instances newData = new Instances(data);
newData.insertAttributeAt(new Attribute("ID", (FastVector) null), 0);
int attrIdx = newData.attribute("ID").index(); // Paranoid... should be 0
for (int c = 0; c < numInstances; c++) {
newData.instance(c).setValue(attrIdx, instanceNames[c]);
}
data = newData;
// System.err.println("DEBUG: data.numInstances: "+data.numInstances());
// System.err.println("DEBUG: data.numAttributes: "+data.numAttributes());
return (data);
}
@Override
protected Instances determineOutputFormat(Instances inputFormat) throws Exception {
inputFormat.insertAttributeAt(getIndicatorAttribute(), inputFormat.numAttributes() - 1);
return inputFormat;
}
