com.expleague.ml.data.tools.DataTools Maven / Gradle / Ivy
package com.expleague.ml.data.tools;
import com.expleague.commons.func.types.SerializationRepository;
import com.expleague.commons.func.types.impl.TypeConvertersCollection;
import com.expleague.commons.io.StreamTools;
import com.expleague.commons.math.Func;
import com.expleague.commons.math.MathTools;
import com.expleague.commons.math.Trans;
import com.expleague.commons.math.vectors.*;
import com.expleague.commons.math.vectors.impl.mx.MxByRowsBuilder;
import com.expleague.commons.math.vectors.impl.vectors.ArrayVec;
import com.expleague.commons.math.vectors.impl.vectors.IndexTransVec;
import com.expleague.commons.math.vectors.impl.vectors.VecBuilder;
import com.expleague.commons.random.FastRandom;
import com.expleague.commons.seq.*;
import com.expleague.commons.system.RuntimeUtils;
import com.expleague.commons.text.StringUtils;
import com.expleague.commons.util.JSONTools;
import com.expleague.commons.util.logging.Logger;
import com.expleague.ml.impl.BFGridConstructor;
import com.expleague.ml.impl.BFGridImpl;
import com.expleague.ml.CompositeTrans;
import com.expleague.ml.data.set.DataSet;
import com.expleague.ml.data.set.VecDataSet;
import com.expleague.ml.data.set.impl.VecDataSetImpl;
import com.expleague.ml.dynamicGrid.models.ObliviousTreeDynamicBin;
import com.expleague.ml.func.FuncJoin;
import com.expleague.ml.BFGrid;
import com.expleague.ml.io.ModelsSerializationRepository;
import com.expleague.ml.loss.L2;
import com.expleague.ml.loss.StatBasedLoss;
import com.expleague.ml.loss.WeightedLoss;
import com.expleague.ml.meta.GroupedDSItem;
import com.expleague.ml.meta.PoolFeatureMeta;
import com.expleague.ml.meta.impl.JsonFeatureMeta;
import com.expleague.ml.meta.impl.JsonTargetMeta;
import com.expleague.ml.meta.items.FakeItem;
import com.expleague.ml.meta.items.QURLItem;
import com.expleague.ml.models.MultiClassModel;
import com.expleague.ml.models.ObliviousTree;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.AnnotationIntrospector;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.type.CollectionType;
import com.fasterxml.jackson.module.jaxb.JaxbAnnotationIntrospector;
import com.expleague.commons.math.vectors.impl.idxtrans.RowsPermutation;
import com.expleague.commons.math.vectors.impl.mx.VecBasedMx;
import com.expleague.commons.math.vectors.impl.vectors.SparseVec;
import com.expleague.commons.util.ArrayTools;
import com.expleague.commons.util.Pair;
import com.expleague.ml.TargetFunc;
import com.expleague.ml.dynamicGrid.interfaces.DynamicGrid;
import com.expleague.ml.func.Ensemble;
import com.expleague.ml.func.TransJoin;
import com.expleague.ml.meta.DSItem;
import com.expleague.ml.meta.impl.JsonDataSetMeta;
import com.expleague.ml.models.ObliviousMultiClassTree;
import com.expleague.ml.models.multilabel.MultiLabelBinarizedModel;
import gnu.trove.list.TDoubleList;
import gnu.trove.list.TIntList;
import gnu.trove.list.array.TIntArrayList;
import gnu.trove.list.linked.TDoubleLinkedList;
import gnu.trove.list.linked.TIntLinkedList;
import gnu.trove.map.TIntObjectMap;
import gnu.trove.map.TObjectIntMap;
import gnu.trove.map.hash.TIntObjectHashMap;
import gnu.trove.map.hash.TObjectIntHashMap;
import org.apache.commons.lang3.mutable.MutableInt;
import java.io.*;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.util.*;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.stream.Collectors;
import java.util.zip.GZIPInputStream;
/**
* User: solar
* Date: 26.12.10
* Time: 19:05
*/
@SuppressWarnings("unused")
public class DataTools {
public static Logger log = Logger.create(DataTools.class);
public static final SerializationRepository SERIALIZATION = new SerializationRepository<>(
new TypeConvertersCollection(MathTools.CONVERSION, DataTools.class, "com.expleague.ml.io"), CharSequence.class);
public static Pool loadFromFeaturesTxt(final String file) throws IOException {
return loadFromFeaturesTxt(file, file.endsWith(".gz") ? new InputStreamReader(new GZIPInputStream(new FileInputStream(file))) : new FileReader(file));
}
public static FeaturesTxtPool loadFromFeaturesTxt(final String fileName, final Reader in) throws IOException {
final List items = new ArrayList<>();
final VecBuilder target = new VecBuilder();
final VecBuilder data = new VecBuilder();
final int[] featuresCount = new int[]{-1};
CharSeqTools.processLines(in, new Consumer() {
int lindex = 0;
@Override
public void accept(final CharSequence arg) {
lindex++;
final CharSequence[] parts = CharSeqTools.split(arg, '\t');
items.add(new QURLItem(CharSeqTools.parseInt(parts[0]), parts[2].toString(), CharSeqTools.parseInt(parts[3])));
target.append(CharSeqTools.parseDouble(parts[1]));
if (featuresCount[0] < 0)
featuresCount[0] = parts.length - 4;
else if (featuresCount[0] != parts.length - 4)
throw new RuntimeException("\"Failed to parse line \" + lindex + \":\"");
for (int i = 4; i < parts.length; i++) {
data.append(CharSeqTools.parseDouble(parts[i]));
}
}
});
return new FeaturesTxtPool(
new ArraySeq<>(items.toArray(new QURLItem[items.size()])),
new VecBasedMx(featuresCount[0], data.build()),
target.build()
);
}
public static int getLineCount(final Reader input, final char sep) {
return CharSeqTools.lines(input, false).limit(1).map(line -> CharSeqTools.split(line, sep).length).findFirst().orElse(0);
}
public static double stringToDoubleHash(final CharSequence in) {
final long hashCode = in.toString().hashCode();
return hashCode * 1.0 / (1L << 32);
}
public static CatboostPool loadFromCatBoostPool(final CatBoostPoolDescription poolDescription,
final Reader in) throws IOException {
final VecBuilder target = new VecBuilder();
final VecBuilder data = new VecBuilder();
CharSeqTools.processLines(in, new Consumer() {
int lindex = -1;
@Override
public void accept(final CharSequence arg) {
lindex++;
if (lindex == 0 && poolDescription.hasHeaderColumn()) {
return;
}
final CharSequence[] parts = CharSeqTools.split(arg, poolDescription.getDelimiter());
if (parts.length != poolDescription.columnCount()) {
throw new RuntimeException("\"Failed to parse line \" + lindex + \":\"");
}
int id = lindex;
for (int column = 0; column < poolDescription.columnCount(); ++column) {
final CharSequence columnSeq = parts[column];
switch (poolDescription.columnType(column)) {
case Target: {
target.append(CharSeqTools.parseDouble(columnSeq));
break;
}
case Num: {
data.append(CharSeqTools.parseDouble(columnSeq));
break;
}
case Categ: {
final double value = stringToDoubleHash(columnSeq);
if (Double.isNaN(value)) {
throw new RuntimeException("Error: catFeature hash values should not be NaN");
}
data.append(value);
break;
}
case Weight: {
throw new RuntimeException("Unimplemented yet");
}
case DocId:
case Auxiliary:
case QueryId:
default: {
break;
}
}
}
}
});
final Set catFeatureIds = new TreeSet<>();
int factorId = 0;
for (int column = 0; column < poolDescription.columnCount(); ++column) {
final CatBoostPoolDescription.ColumnType columnType = poolDescription.columnType(column);
if (columnType == CatBoostPoolDescription.ColumnType.Categ) {
catFeatureIds.add(factorId);
}
if (CatBoostPoolDescription.ColumnType.isFactorColumn(columnType)) {
++factorId;
}
}
final Mx vecData = new VecBasedMx(poolDescription.factorCount(), data.build());
final Vec targetVec = target.build();
return new CatboostPool(vecData, targetVec, catFeatureIds);
}
public static void writeModel(final Function result, final File to) throws IOException {
writeModel(result, new FileOutputStream(to));
}
public static void writeModel(final Function result, OutputStream to) {
final BFGrid grid = grid(result);
StreamTools.writeChars(CharSeqTools.concat(result.getClass().getCanonicalName(), "\t", Boolean.toString(grid != null), "\n", SERIALIZATION.write(result)), to);
}
public static T readModel(final InputStream inputStream, final ModelsSerializationRepository serializationRepository) throws IOException, ClassNotFoundException {
final LineNumberReader modelReader = new LineNumberReader(new InputStreamReader(inputStream));
final String line = modelReader.readLine();
final CharSequence[] parts = CharSeqTools.split(line, '\t');
//noinspection unchecked
final Class modelClazz = (Class) Class.forName(parts[0].toString());
//noinspection unchecked
return (T) serializationRepository.read(StreamTools.readReader(modelReader), modelClazz);
}
public static T readModel(final String fileName, final ModelsSerializationRepository serializationRepository) throws IOException, ClassNotFoundException {
return readModel(new FileInputStream(fileName), serializationRepository);
}
public static T readModel(final InputStream modelInputStream, final InputStream gridInputStream) throws IOException, ClassNotFoundException {
final ModelsSerializationRepository repository = new ModelsSerializationRepository();
final BFGrid grid = repository.read(StreamTools.readStream(gridInputStream), BFGridImpl.class);
final ModelsSerializationRepository customizedRepository = repository.customizeGrid(grid);
return readModel(modelInputStream, customizedRepository);
}
public static T readModel(final InputStream modelInputStream) throws IOException, ClassNotFoundException {
final ModelsSerializationRepository repository = new ModelsSerializationRepository();
final BFGridConstructor grid = new BFGridConstructor();
final ModelsSerializationRepository customizedRepository = repository.customizeGrid(grid);
T model = readModel(modelInputStream, customizedRepository);
grid.build();
return model;
}
public static void writeBinModel(final Function result, final File file) {
if (result instanceof Ensemble) {
//noinspection unchecked
final Ensemble ensemble = (Ensemble) result;
if (ensemble.models.length == 0)
return;
if (ensemble.models[0] instanceof ObliviousTreeDynamicBin) {
final DynamicGrid grid = dynamicGrid(ensemble);
final DynamicBinModelBuilder builder = new DynamicBinModelBuilder(Objects.requireNonNull(grid));
for (int i = 0; i < ensemble.models.length; ++i) {
builder.append((ObliviousTreeDynamicBin) ensemble.models[i], ensemble.weights.at(i));
}
builder.build().toFile(file);
} else if (ensemble.models[0] instanceof ObliviousTree) {
final BFGrid grid = grid(ensemble);
final BinModelBuilder builder = new BinModelBuilder(Objects.requireNonNull(grid));
for (int i = 0; i < ensemble.models.length; ++i) {
builder.append((ObliviousTree) ensemble.models[i], ensemble.weights.at(i));
}
builder.build().toFile(file);
}
}
}
public static Pair validateModel(final InputStream modelInputStream, final ModelsSerializationRepository repository) throws IOException {
try {
final Trans trans = readModel(modelInputStream, repository);
return Pair.create(true, "Valid model : " + trans.getClass().getSimpleName());
}
catch (ClassNotFoundException e) {
return Pair.create(false, "Invalid model : " + e.getCause());
}
}
public static Pair validateModel(final String filePath, final ModelsSerializationRepository repository) throws IOException {
return validateModel(new FileInputStream(filePath), repository);
}
public static DynamicGrid dynamicGrid(final Function result) {
if (result instanceof Ensemble) {
final Ensemble ensemble = (Ensemble) result;
return dynamicGrid(ensemble.last());
}
else if (result instanceof ObliviousTreeDynamicBin) {
return ((ObliviousTreeDynamicBin) result).grid();
}
return null;
}
public static BFGrid grid(final Function result) {
if (result instanceof CompositeTrans) {
final CompositeTrans composite = (CompositeTrans) result;
BFGrid grid = grid(composite.f);
grid = grid == null ? grid(composite.g) : grid;
return grid;
}
else if (result instanceof FuncJoin) {
final FuncJoin join = (FuncJoin) result;
for (final Func dir : join.dirs()) {
final BFGrid grid = grid(dir);
if (grid != null)
return grid;
}
}
else if (result instanceof TransJoin) {
final TransJoin join = (TransJoin) result;
for (final Trans dir : join.dirs) {
final BFGrid grid = grid(dir);
if (grid != null)
return grid;
}
}
else if (result instanceof Ensemble) {
final Ensemble ensemble = (Ensemble) result;
for (final Trans dir : ensemble.models) {
final BFGrid grid = grid(dir);
if (grid != null)
return grid;
}
}
else if (result instanceof MultiClassModel) {
return grid(((MultiClassModel) result).getInternModel());
}
else if (result instanceof MultiLabelBinarizedModel) {
return grid(((MultiLabelBinarizedModel) result).getInternModel());
}
else if (result instanceof ObliviousTree) {
return ((ObliviousTree) result).grid();
}
else if (result instanceof ObliviousMultiClassTree) {
return ((ObliviousMultiClassTree) result).binaryClassifier().grid();
}
return null;
}
public static DataSet extendDataset(final VecDataSet sourceDS, final Mx addedColumns) {
final Vec[] columns = new Vec[addedColumns.columns()];
for (int i = 0; i < addedColumns.columns(); i++) {
columns[i] = addedColumns.col(i);
}
return extendDataset(sourceDS, columns);
}
public static VecDataSet extendDataset(final VecDataSet sourceDS, final Vec... addedColumns) {
if (addedColumns.length == 0)
return sourceDS;
final Mx oldData = sourceDS.data();
final Mx newData = new VecBasedMx(oldData.rows(), oldData.columns() + addedColumns.length);
for (final MxIterator iter = oldData.nonZeroes(); iter.advance(); ) {
newData.set(iter.row(), iter.column(), iter.value());
}
for (int i = 0; i < addedColumns.length; i++) {
for (final VecIterator iter = addedColumns[i].nonZeroes(); iter.advance(); ) {
newData.set(iter.index(), oldData.columns() + i, iter.value());
}
}
return new VecDataSetImpl(newData, sourceDS);
}
public static Vec value(final Mx ds, final Func f) {
final Vec result = new ArrayVec(ds.rows());
for (int i = 0; i < ds.rows(); i++) {
result.set(i, f.value(ds.row(i)));
}
return result;
}
public static WeightedLoss bootstrap(final LocalLoss loss, final FastRandom rnd) {
final int[] poissonWeights = new int[loss.xdim()];
for (int i = 0; i < loss.xdim(); i++) {
poissonWeights[i] = rnd.nextPoisson(1.);
}
return new WeightedLoss<>(loss, poissonWeights);
}
public static Class targetByName(final String name) {
try {
//noinspection unchecked
return (Class) Class.forName("com.expleague.ml.loss." + name);
}
catch (Exception e) {
throw new RuntimeException("Unable to create requested target: " + name, e);
}
}
public static int[][] splitAtRandom(final int size, final FastRandom rng, final double... v) {
final Vec weights = new ArrayVec(v);
final TIntList[] folds = new TIntList[v.length];
for (int i = 0; i < folds.length; i++) {
folds[i] = new TIntLinkedList();
}
for (int i = 0; i < size; i++) {
folds[rng.nextSimple(weights)].add(i);
}
final int[][] result = new int[folds.length][];
for (int i = 0; i < folds.length; i++) {
result[i] = folds[i].toArray();
}
return result;
}
public static List> splitDataSet(Pool pool, final FastRandom rng, final double... v) {
final int[][] cvSplit = DataTools.splitAtRandom(pool.size(), rng, v);
final List> result = new ArrayList<>();
for (int i = 0; i < v.length; i++) {
result.add(pool.sub(cvSplit[i]));
}
return result;
}
public static List> splitGroupDataSet(Pool pool, final FastRandom rng, final double... v) {
final TObjectIntMap groups = new TObjectIntHashMap<>();
final TIntObjectMap rgroups = new TIntObjectHashMap<>();
for (int i = 0; i < pool.size(); i++) {
final String group = pool.items.at(i).groupId();
if (!groups.containsKey(group)) {
rgroups.put(groups.size(), group);
groups.put(group, groups.size());
}
}
final int[][] cvSplit = DataTools.splitAtRandom(groups.size(), rng, v);
final List> result = new ArrayList<>();
for (int i = 0; i < v.length; i++) {
final TIntList indices = new TIntArrayList();
final Set currentGroups = Arrays.stream(cvSplit[i]).mapToObj(rgroups::get).collect(Collectors.toSet());
for (int j = 0; j < pool.size(); j++) {
final String group = pool.items.at(j).groupId();
if (currentGroups.contains(group))
indices.add(j);
}
result.add(pool.sub(indices.toArray()));
}
return result;
}
public static Vec calcAll(final Function result, final DataSet data) {
final VecBuilder results = new VecBuilder(data.length());
int dim = 0;
for (int i = 0; i < data.length(); i++) {
final Vec vec = result.apply(data.at(i));
for (int j = 0; j < vec.length(); j++) {
results.add(vec.at(j));
}
dim = vec.length();
}
return dim > 1 ? new VecBasedMx(dim, results.build()) : results.build();
}
public static Target newTarget(final Class targetClass, final Seq values, final DataSet ds) {
Target target;
target = RuntimeUtils.newInstanceByAssignable(targetClass, values, ds);
if (target != null)
return target;
throw new RuntimeException("No proper constructor!");
}
public static void writePoolTo(final Pool pool, final Writer out) throws IOException {
final JsonFactory jsonFactory = new JsonFactory();
jsonFactory.disable(JsonGenerator.Feature.QUOTE_FIELD_NAMES);
jsonFactory.configure(JsonParser.Feature.ALLOW_COMMENTS, false);
final JsonGenerator generator = jsonFactory.createGenerator(out);
{ // meta
out.append("items").append('\t');
final ObjectMapper mapper = new ObjectMapper(jsonFactory);
final AnnotationIntrospector introspector =
new JaxbAnnotationIntrospector(mapper.getTypeFactory());
{
mapper.setAnnotationIntrospector(introspector);
generator.writeStartObject();
generator.writeStringField("id", pool.meta().id());
generator.writeStringField("author", pool.meta().author());
generator.writeStringField("source", pool.meta().source());
generator.writeNumberField("created", pool.meta().created().getTime());
generator.writeStringField("type", pool.meta().type().getCanonicalName());
generator.writeEndObject();
generator.flush();
}
out.append('\t');
{
generator.setCodec(mapper);
generator.writeStartArray();
for (int i = 0; i < pool.size(); i++) {
generator.writeObject(pool.data().at(i));
}
generator.writeEndArray();
generator.flush();
}
out.append('\n');
}
for (int i = 0; i < pool.fcount(); i++) { // features
out.append("feature").append('\t');
writeFeature(out, jsonFactory, pool.fmeta(i), pool.fdata(i));
}
for (int i = 0; i < pool.tcount(); i++) { // targets
out.append("target").append('\t');
writeFeature(out, jsonFactory, pool.tmeta(i), pool.tdata(i));
}
out.flush();
generator.close();
}
private static void writeFeature(final Writer out, final JsonFactory jsonFactory,
final PoolFeatureMeta meta, Seq values) throws IOException {
{
final StringWriter writer = new StringWriter();
final JsonGenerator generator = jsonFactory.createGenerator(writer);
generator.writeStartObject();
generator.writeStringField("id", meta.id());
generator.writeStringField("description", meta.description());
generator.writeStringField("type", meta.type().name());
generator.writeStringField("associated", meta.associated().meta().id());
generator.writeEndObject();
generator.close();
out.append(writer.getBuffer());
}
out.append('\t');
out.append(SERIALIZATION.write(values));
out.append('\n');
}
public static Pool readPoolFrom(final Reader input) throws IOException {
try {
final PoolBuilder builder = new PoolBuilder();
final ReaderChopper chopper = new ReaderChopper(input);
CharSequence name;
while ((name = chopper.chop('\t')) != null) {
if (name.length() == 0)
continue;
final JsonParser parser = JSONTools.parseJSON(chopper.chop('\t'));
switch (name.toString()) {
case "items": {
final JsonDataSetMeta meta = parser.readValueAs(JsonDataSetMeta.class);
builder.setMeta(meta);
final JsonParser parseItems = JSONTools.parseJSON(chopper.chop('\n'));
final ObjectMapper mapper = (ObjectMapper) parseItems.getCodec();
mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
final CollectionType itemsGroupType = mapper.getTypeFactory().constructCollectionType(List.class, meta.type());
final List myObjects = mapper.readValue(parseItems, itemsGroupType);
for (int i = 0; i < myObjects.size(); i++) {
builder.addItem(myObjects.get(i));
}
break;
}
case "feature": {
final JsonFeatureMeta fmeta = parser.readValueAs(JsonFeatureMeta.class);
final Class> vecClass = fmeta.type().clazz();
builder.newFeature(fmeta, SERIALIZATION.read(
chopper.chop('\n'),
vecClass));
break;
}
case "target": {
final JsonTargetMeta fmeta = parser.readValueAs(JsonTargetMeta.class);
final Class> vecClass = fmeta.type().clazz();
builder.newTarget(fmeta, SERIALIZATION.read(
chopper.chop('\n'),
vecClass));
break;
}
}
}
//noinspection unchecked
return (Pool) builder.create();
}
catch (RuntimeException e) {
if (e.getCause() instanceof IOException) {
throw (IOException) e.getCause();
}
throw e;
}
}
public static Pool loadFromFile(final String fileName) throws IOException {
return loadFromFile(new File(fileName));
}
public static Reader gzipOrFileReader(final File file) throws IOException {
return file.getName().endsWith(".gz") ?
new InputStreamReader(new GZIPInputStream(new FileInputStream(file))) :
new FileReader(file);
}
public static Pool loadFromFile(final File file) throws IOException {
try (final Reader input = gzipOrFileReader(file)) {
return readPoolFrom(input);
}
}
public static > Pair createSubset(final VecDataSet sourceDS, final S sourceTarget, final int[] idxs) {
final VecDataSet subSet = new VecDataSetImpl(
new VecBasedMx(
sourceDS.xdim(),
new IndexTransVec(sourceDS.data(),
new RowsPermutation(
idxs,
sourceDS.xdim()
)
)
),
sourceDS
);
final S subTarget = (S) ArrayTools.cut((Seq) sourceTarget, idxs);
return Pair.create(subSet, subTarget);
}
public static String getPoolInfo(final Pool pool) {
final VecDataSet vecDataSet = pool.vecData();
final StringBuilder builder = new StringBuilder()
.append("Pool size = ").append(pool.size())
.append("\n")
.append("VecDS features count = ").append(vecDataSet.xdim())
.append("\n");
for (int i = 0; i < pool.fcount(); i++) {
builder
.append("\n")
.append("feature #").append(i)
.append(": type = ").append(pool.fmeta(i).type());
}
return builder.toString();
}
public static Pool loadFromLibSvmFormat(final Reader in) throws IOException {
final MutableInt poolFeaturesCount = new MutableInt(-1);
final VecBuilder targetBuilder = new VecBuilder();
final List> features = new ArrayList<>();
CharSeqTools.processLines(in, new Consumer() {
int lindex = 0;
@Override
public void accept(final CharSequence arg) {
final CharSequence[] parts = CharSeqTools.split(arg, ' ');
targetBuilder.add(CharSeqTools.parseDouble(parts[0]));
final TIntList rowIndices = new TIntLinkedList();
final TDoubleList rowValues = new TDoubleLinkedList();
for (int i = 1; i < parts.length; i++) {
final CharSequence indexAndValue = parts[i];
if (StringUtils.isBlank(indexAndValue)) {
continue;
}
final CharSequence[] split = CharSeqTools.split(indexAndValue, ':');
final int index = CharSeqTools.parseInt(split[0]);
final double value = CharSeqTools.parseDouble(split[1]);
rowIndices.add(index);
rowValues.add(value);
if (poolFeaturesCount.intValue() < index + 1) {
poolFeaturesCount.setValue(index + 1);
}
}
features.add(Pair.create(rowIndices, rowValues));
lindex++;
}
});
final MxBuilder mxBuilder = new MxByRowsBuilder();
for (Pair pair : features) {
mxBuilder.add(new SparseVec(poolFeaturesCount.intValue(), pair.getFirst().toArray(), pair.getSecond().toArray()));
}
final Mx dataMx = mxBuilder.build();
return FakePool.create(dataMx, targetBuilder.build());
}
public static void writePoolInLibfmFormat(final Pool pool, final Writer out) throws IOException {
final Mx data = pool.vecData().data();
final Vec target = pool.target(L2.class).target;
for (int i = 0; i < pool.size(); i++) {
final double t = target.get(i);
out.append(String.valueOf(t));
final VecIterator vecIterator = data.row(i).nonZeroes();
while (vecIterator.advance()) {
out.append("\t")
.append(String.valueOf(vecIterator.index()))
.append(":")
.append(String.valueOf(vecIterator.value()));
}
out.append("\n");
}
out.flush();
}
public static void writeClassicPoolTo(final Pool pool, final String fileName) throws IOException {
DataTools.writeClassicPoolTo(pool, new BufferedWriter(new FileWriter(fileName)));
}
public static void writeClassicPoolTo(final Pool pool, final Writer out) throws IOException {
final DecimalFormat preciseFormatter = new DecimalFormat("###.########", new DecimalFormatSymbols(Locale.US));
final Mx vecData = pool.vecData().data();
final Vec target = pool.target(L2.class).target;
for (int i = 0; i < vecData.rows(); i++) {
out.write(String.format("%d\t%s\turl\t0", i, preciseFormatter.format(target.get(i))));
for (int j = 0; j < vecData.columns(); j++) {
out.append("\t").append(preciseFormatter.format(vecData.get(i, j)));
}
out.write("\n");
}
out.flush();
}
}
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