Package smile.datasets

Record Class MNIST

java.lang.Object
java.lang.Record
smile.datasets.MNIST
Record Components:
data - data frame.
formula - modeling formula.
public record MNIST(DataFrame data, Formula formula) extends Record
MNIST dataset. This is a large dataset of handwritten digits normalized to fit into a 28x28 pixel bounding box and anti-aliased, which introduced grayscale levels. The MNIST dataset contains 60,000 training images and 10,000 testing images.

  • Constructor Summary

    Constructors
    Constructor
    Description
    MNIST()
    Constructor.
    MNIST(Path dataFilePath, Path labelFilePath)
    Constructor.
    MNIST(DataFrame data, Formula formula)
    Creates an instance of a MNIST record class.

  • Method Summary

    Modifier and Type
    Method
    Description
    DataFrame
    data()
    Returns the value of the data record component.
    final boolean
    equals(Object o)
    Indicates whether some other object is "equal to" this one.
    Formula
    formula()
    Returns the value of the formula record component.
    final int
    hashCode()
    Returns a hash code value for this object.
    final String
    toString()
    Returns a string representation of this record class.
    double[][]
    x()
    Returns the sample features.
    int[]
    y()
    Returns the class labels.

    Methods inherited from class java.lang.Object

    clone, finalize, getClass, notify, notifyAll, wait, wait, wait

  • Constructor Details

    • MNIST

      public MNIST() throws IOException
      Constructor.
      Throws:
      IOException - when fails to read the file.

    • MNIST

      public MNIST(Path dataFilePath, Path labelFilePath) throws IOException
      Constructor.
      Parameters:
      dataFilePath - the path to data file.
      labelFilePath - the path to label file.
      Throws:
      IOException - when fails to read the file.

    • MNIST

      public MNIST(DataFrame data, Formula formula)
      Creates an instance of a MNIST record class.
      Parameters:
      data - the value for the data record component
      formula - the value for the formula record component

  • Method Details

    • x

      public double[][] x()
      Returns the sample features.
      Returns:
      the sample features.

    • y

      public int[] y()
      Returns the class labels.
      Returns:
      the class labels.

    • toString

      public final String toString()
      Returns a string representation of this record class. The representation contains the name of the class, followed by the name and value of each of the record components.
      Specified by:
      toString in class Record
      Returns:
      a string representation of this object

    • hashCode

      public final int hashCode()
      Returns a hash code value for this object. The value is derived from the hash code of each of the record components.
      Specified by:
      hashCode in class Record
      Returns:
      a hash code value for this object

    • equals

      public final boolean equals(Object o)
      Indicates whether some other object is "equal to" this one. The objects are equal if the other object is of the same class and if all the record components are equal. All components in this record class are compared with Objects::equals(Object,Object).
      Specified by:
      equals in class Record
      Parameters:
      o - the object with which to compare
      Returns:
      true if this object is the same as the o argument; false otherwise.

    • data

      public DataFrame data()
      Returns the value of the data record component.
      Returns:
      the value of the data record component

    • formula

      public Formula formula()
      Returns the value of the formula record component.
      Returns:
      the value of the formula record component