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Java example source code file (MnistDataSetIterator.java)

This example Java source code file (MnistDataSetIterator.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

basedatasetiterator, ioexception, mnistdatafetcher, mnistdatasetiterator

The MnistDataSetIterator.java Java example source code

/*
 *
 *  * Copyright 2015 Skymind,Inc.
 *  *
 *  *    Licensed under the Apache License, Version 2.0 (the "License");
 *  *    you may not use this file except in compliance with the License.
 *  *    You may obtain a copy of the License at
 *  *
 *  *        http://www.apache.org/licenses/LICENSE-2.0
 *  *
 *  *    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.
 *
 */

package org.deeplearning4j.datasets.iterator.impl;

import java.io.IOException;

import org.deeplearning4j.datasets.fetchers.MnistDataFetcher;
import org.deeplearning4j.datasets.iterator.BaseDatasetIterator;

/**
 * Mnist data applyTransformToDestination iterator.
 * @author Adam Gibson
 */
public class MnistDataSetIterator extends BaseDatasetIterator {

	public MnistDataSetIterator(int batch,int numExamples) throws IOException {
		this(batch,numExamples,false);
	}

    /**Get the specified number of examples for the MNIST training data set.
     * @param batch the batch size of the examples
     * @param numExamples the overall number of examples
     * @param binarize whether to binarize mnist or not
     * @throws IOException
     */
    public MnistDataSetIterator(int batch, int numExamples, boolean binarize) throws IOException {
        this(batch,numExamples,binarize,true,false,0);
    }

    /** Constructor to get the full MNIST data set (either test or train sets) without binarization (i.e., just normalization
     * into range of 0 to 1), with shuffling based on a random seed.
     * @param batchSize
     * @param train
     * @throws IOException
     */
    public MnistDataSetIterator(int batchSize, boolean train, int seed) throws IOException{
        this(batchSize, (train ? MnistDataFetcher.NUM_EXAMPLES : MnistDataFetcher.NUM_EXAMPLES_TEST), false, train, true, seed);
    }

    /**Get the specified number of MNIST examples (test or train set), with optional shuffling and binarization.
     * @param batch Size of each patch
     * @param numExamples total number of examples to load
     * @param binarize whether to binarize the data or not (if false: normalize in range 0 to 1)
     * @param train Train vs. test set
     * @param shuffle whether to shuffle the examples
     * @param rngSeed random number generator seed to use when shuffling examples
     */
    public MnistDataSetIterator(int batch, int numExamples, boolean binarize, boolean train, boolean shuffle, long rngSeed) throws IOException {
        super(batch, numExamples,new MnistDataFetcher(binarize,train,shuffle,rngSeed));
    }


}

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