Package org.apache.spark.mllib.linalg

Class DenseVector

Object
org.apache.spark.mllib.linalg.DenseVector
All Implemented Interfaces:
Serializable, Vector
public class DenseVector extends Object implements Vector
A dense vector represented by a value array.
See Also:

  • Constructor Details

    • DenseVector

      public DenseVector(double[] values)

  • Method Details

    • unapply

      public static scala.Option<double[]> unapply(DenseVector dv)
      Extracts the value array from a dense vector.

    • fromML

      public static DenseVector fromML(DenseVector v)
      Convert new linalg type to spark.mllib type. Light copy; only copies references
      Parameters:
      v - (undocumented)
      Returns:
      (undocumented)

    • values

      public double[] values()

    • size

      public int size()
      Description copied from interface: Vector
      Size of the vector.
      Specified by:
      size in interface Vector
      Returns:
      (undocumented)

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • toArray

      public double[] toArray()
      Description copied from interface: Vector
      Converts the instance to a double array.
      Specified by:
      toArray in interface Vector
      Returns:
      (undocumented)

    • apply

      public double apply(int i)
      Description copied from interface: Vector
      Gets the value of the ith element.
      Specified by:
      apply in interface Vector
      Parameters:
      i - index
      Returns:
      (undocumented)

    • copy

      public DenseVector copy()
      Description copied from interface: Vector
      Makes a deep copy of this vector.
      Specified by:
      copy in interface Vector
      Returns:
      (undocumented)

    • equals

      public boolean equals(Object other)
      Specified by:
      equals in interface Vector
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Description copied from interface: Vector
      Returns a hash code value for the vector. The hash code is based on its size and its first 128 nonzero entries, using a hash algorithm similar to java.util.Arrays.hashCode.
      Specified by:
      hashCode in interface Vector
      Overrides:
      hashCode in class Object
      Returns:
      (undocumented)

    • numActives

      public int numActives()
      Description copied from interface: Vector
      Number of active entries. An "active entry" is an element which is explicitly stored, regardless of its value.

      Specified by:
      numActives in interface Vector
      Returns:
      (undocumented)

    • numNonzeros

      public int numNonzeros()
      Description copied from interface: Vector
      Number of nonzero elements. This scans all active values and count nonzeros.
      Specified by:
      numNonzeros in interface Vector
      Returns:
      (undocumented)

    • argmax

      public int argmax()
      Description copied from interface: Vector
      Find the index of a maximal element. Returns the first maximal element in case of a tie. Returns -1 if vector has length 0.
      Specified by:
      argmax in interface Vector
      Returns:
      (undocumented)

    • toJson

      public String toJson()
      Description copied from interface: Vector
      Converts the vector to a JSON string.
      Specified by:
      toJson in interface Vector
      Returns:
      (undocumented)

    • asML

      public DenseVector asML()
      Description copied from interface: Vector
      Convert this vector to the new mllib-local representation. This does NOT copy the data; it copies references.
      Specified by:
      asML in interface Vector
      Returns:
      (undocumented)