org.deeplearning4j.datasets.mnist

Class MnistLabelFile

java.lang.Object

java.io.RandomAccessFile

org.deeplearning4j.datasets.mnist.MnistDbFile

org.deeplearning4j.datasets.mnist.MnistLabelFile

All Implemented Interfaces:

java.io.Closeable, java.io.DataInput, java.io.DataOutput, java.lang.AutoCloseable

public class MnistLabelFile
extends MnistDbFile

MNIST database label file.

Constructor Summary

Constructors

Constructor and Description
MnistLabelFile(java.lang.String name, java.lang.String mode) Creates new MNIST database label file ready for reading.

Method Summary

Modifier and Type	Method and Description
protected int	getMagicNumber() MNIST DB files start with unique integer number.
int	readLabel() Reads the integer at the current position.
int[]	readLabels(int num) Read the specified number of labels from the current position

Methods inherited from class org.deeplearning4j.datasets.mnist.MnistDbFile

getCount, getCurrentIndex, getEntryLength, getHeaderSize, next, prev, setCurrentIndex

Methods inherited from class java.io.RandomAccessFile

close, getChannel, getFD, getFilePointer, length, read, read, read, readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, seek, setLength, skipBytes, write, write, write, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeDouble, writeFloat, writeInt, writeLong, writeShort, writeUTF

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MnistLabelFile

public MnistLabelFile(java.lang.String name,
                      java.lang.String mode)
               throws java.io.IOException

Creates new MNIST database label file ready for reading.

Parameters:

name - the system-dependent filename

mode - the access mode

Throws:

java.io.IOException

java.io.FileNotFoundException

Method Detail

readLabel

public int readLabel()
              throws java.io.IOException

Reads the integer at the current position.

Returns:

integer representing the label

Throws:

java.io.IOException

readLabels

public int[] readLabels(int num)
                 throws java.io.IOException

Read the specified number of labels from the current position

Throws:

java.io.IOException

getMagicNumber

protected int getMagicNumber()

Description copied from class: MnistDbFile

MNIST DB files start with unique integer number.

Specified by:

getMagicNumber in class MnistDbFile

Returns:

integer number that should be found in the beginning of the file.