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/*
* ******************************************************************************
* *
* *
* * This program and the accompanying materials are made available under the
* * terms of the Apache License, Version 2.0 which is available at
* * https://www.apache.org/licenses/LICENSE-2.0.
* *
* * See the NOTICE file distributed with this work for additional
* * information regarding copyright ownership.
* * Unless required by applicable law or agreed to in writing, software
* * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* * License for the specific language governing permissions and limitations
* * under the License.
* *
* * SPDX-License-Identifier: Apache-2.0
* *****************************************************************************
*/
package org.nd4j.linalg.dataset.api;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.rng.Random;
import org.nd4j.linalg.dataset.SplitTestAndTrain;
import org.nd4j.linalg.dataset.api.iterator.DataSetIterator;
import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Serializable;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
public interface DataSet extends Iterable, Serializable {
DataSet getRange(int from, int to);
/**
* Load the contents of the DataSet from the specified InputStream. The current contents of the DataSet (if any) will be replaced.
* The InputStream should contain a DataSet that has been serialized with {@link #save(OutputStream)}
*
* @param from InputStream to load the DataSet from
*/
void load(InputStream from);
/**
* Load the contents of the DataSet from the specified File. The current contents of the DataSet (if any) will be replaced.
* The InputStream should contain a DataSet that has been serialized with {@link #save(File)}
*
* @param from File to load the DataSet from
*/
void load(File from);
/**
* Write the contents of this DataSet to the specified OutputStream
*
* @param to OutputStream to save the DataSet to
*/
void save(OutputStream to);
/**
* Save this DataSet to a file. Can be loaded again using {@link }
*
* @param to File to sa
*/
void save(File to);
@Deprecated
DataSetIterator iterateWithMiniBatches();
String id();
/**
* Returns the features array for the DataSet
*
* @return features array
*/
INDArray getFeatures();
/**
* Set the features array for the DataSet
*
* @param features Features to set
*/
void setFeatures(INDArray features);
/**
* Calculate and return a count of each label, by index.
* Assumes labels are a one-hot INDArray, for classification
*
* @return Map of countsn
*/
Map labelCounts();
/**
* Create a copy of the DataSet
*
* @return Copy of the DataSet
*/
org.nd4j.linalg.dataset.DataSet copy();
org.nd4j.linalg.dataset.DataSet reshape(int rows, int cols);
/**
* Multiply the features by a scalar
*/
void multiplyBy(double num);
/**
* Divide the features by a scalar
*/
void divideBy(int num);
/**
* Shuffle the order of the rows in the DataSet. Note that this generally won't make any difference in practice
* unless the DataSet is later split.
*/
void shuffle();
void squishToRange(double min, double max);
void scaleMinAndMax(double min, double max);
void scale();
void addFeatureVector(INDArray toAdd);
void addFeatureVector(INDArray feature, int example);
/**
* Normalize this DataSet to mean 0, stdev 1 per input.
* This calculates statistics based on the values in a single DataSet only.
* For normalization over multiple DataSet objects, use {@link org.nd4j.linalg.dataset.api.preprocessor.NormalizerStandardize}
*/
void normalize();
void binarize();
void binarize(double cutoff);
/**
* @deprecated Use {@link org.nd4j.linalg.dataset.api.preprocessor.NormalizerStandardize}
*/
@Deprecated
void normalizeZeroMeanZeroUnitVariance();
/**
* Number of input values - i.e., size of the features INDArray per example
*/
int numInputs();
void validate();
int outcome();
void setNewNumberOfLabels(int labels);
void setOutcome(int example, int label);
org.nd4j.linalg.dataset.DataSet get(int i);
org.nd4j.linalg.dataset.DataSet get(int[] i);
List batchBy(int num);
org.nd4j.linalg.dataset.DataSet filterBy(int[] labels);
void filterAndStrip(int[] labels);
/**
* @deprecated prefer {@link #batchBy(int)}
*/
@Deprecated
List dataSetBatches(int num);
List sortAndBatchByNumLabels();
List batchByNumLabels();
/**
* Extract each example in the DataSet into its own DataSet object, and return all of them as a list
* @return List of DataSet objects, each with 1 example only
*/
List asList();
SplitTestAndTrain splitTestAndTrain(int numHoldout, java.util.Random rnd);
SplitTestAndTrain splitTestAndTrain(int numHoldout);
INDArray getLabels();
void setLabels(INDArray labels);
void sortByLabel();
void addRow(org.nd4j.linalg.dataset.DataSet d, int i);
INDArray exampleSums();
INDArray exampleMaxs();
INDArray exampleMeans();
org.nd4j.linalg.dataset.DataSet sample(int numSamples);
org.nd4j.linalg.dataset.DataSet sample(int numSamples, Random rng);
org.nd4j.linalg.dataset.DataSet sample(int numSamples, boolean withReplacement);
org.nd4j.linalg.dataset.DataSet sample(int numSamples, Random rng, boolean withReplacement);
void roundToTheNearest(int roundTo);
/**
* Returns the number of outcomes (size of the labels array for each example)
*/
int numOutcomes();
/**
* Number of examples in the DataSet
*/
int numExamples();
@Deprecated
List getLabelNames();
List getLabelNamesList();
String getLabelName(int idx);
List getLabelNames(INDArray idxs);
void setLabelNames(List labelNames);
List getColumnNames();
void setColumnNames(List columnNames);
/**
* SplitV the DataSet into two DataSets randomly
* @param fractionTrain Fraction (in range 0 to 1) of examples to be returned in the training DataSet object
*/
SplitTestAndTrain splitTestAndTrain(double fractionTrain);
@Override
Iterator iterator();
/**
* Input mask array: a mask array for input, where each value is in {0,1} in order to specify whether an input is
* actually present or not. Typically used for situations such as RNNs with variable length inputs
*
* @return Input mask array
*/
INDArray getFeaturesMaskArray();
/**
* Set the features mask array in this DataSet
*/
void setFeaturesMaskArray(INDArray inputMask);
/**
* Labels (output) mask array: a mask array for input, where each value is in {0,1} in order to specify whether an
* output is actually present or not. Typically used for situations such as RNNs with variable length inputs or many-
* to-one situations.
*
* @return Labels (output) mask array
*/
INDArray getLabelsMaskArray();
/**
* Set the labels mask array in this data set
*/
void setLabelsMaskArray(INDArray labelsMask);
/**
* Whether the labels or input (features) mask arrays are present for this DataSet
*/
boolean hasMaskArrays();
/**
* Set the metadata for this DataSet
* By convention: the metadata can be any serializable object, one per example in the DataSet
*
* @param exampleMetaData Example metadata to set
*/
void setExampleMetaData(List exampleMetaData);
/**
* Get the example metadata, or null if no metadata has been set
* Note: this method results in an unchecked cast - care should be taken when using this!
*
* @param metaDataType Class of the metadata (used for opType information)
* @param Type of metadata
* @return List of metadata objects
*/
List getExampleMetaData(Class metaDataType);
/**
* Get the example metadata, or null if no metadata has been set
*
* @return List of metadata instances
* @see {@link #getExampleMetaData(Class)} for convenience method for types
*/
List getExampleMetaData();
/**
* This method returns memory used by this DataSet
* @return
*/
long getMemoryFootprint();
/**
* This method migrates this DataSet into current Workspace (if any)
*/
void migrate();
/**
* This method detaches this DataSet from current Workspace (if any)
*/
void detach();
/**
* @return true if the DataSet object is empty (no features, labels, or masks)
*/
boolean isEmpty();
MultiDataSet toMultiDataSet();
}
