Class Sparse<T>

Sparse vector representation (in LibSVM format).

Inheritance

System.Object

Sparse<T>

Implements

ICloneable

IList<T>

IList

IFormattable

Namespace: ISynergy.Framework.Mathematics.Common

Assembly: ISynergy.Framework.Mathematics.dll

Syntax

public sealed class Sparse<T> : IEnumerable<T> where T : IEquatable<T>

Type Parameters

Name	Description
T	The type for the non-zero elements in this vector.

Constructors

Sparse()

Creates a sparse vector with zero elements.

Declaration

public Sparse()

Sparse(Int32)

Creates a sparse vector with the maximum number of elements.

Declaration

public Sparse(int length)

Parameters

Type	Name	Description
System.Int32	length	The maximum number of non-zero elements that this vector can accomodate.

Sparse(Int32[], T[])

Creates a sparse vector from a vector of indices and a vector of values occuring at those indices.

Declaration

public Sparse(int[] indices, T[] values)

Parameters

Type	Name	Description
System.Int32[]	indices	The indices for non-zero entries.
T[]	values	The non-zero values happening at each index.

Properties

Indices

Gets or sets the vector of indices indicating the location of the non-zero elements contained in this sparse vector.

Declaration

public int[] Indices { get; set; }

Property Value

Type	Description
System.Int32[]

Item[Int32]

Gets the the value stored at position i.

Declaration

public T this[int i] { get; set; }

Parameters

Type	Name	Description
System.Int32	i

Property Value

Type	Description
T

Length

Gets the maximum non-zero element index in the sparse vector.

Declaration

public int Length { get; }

Property Value

Type	Description
System.Int32

Values

Gets or sets the vector of values indicating which non-zero value happens at each position indicated in Indices.

Declaration

public T[] Values { get; set; }

Property Value

Type	Description
T[]

Methods

Clone()

Creates a new object that is a copy of the current instance.

Declaration

public object Clone()

Returns

Type	Description
System.Object	A new object that is a copy of this instance.

CopyTo(T[], Int32)

Copies the elements of the System.Collections.Generic.ICollection<T> to an System.Array, starting at a particular System.Array index.

Declaration

public void CopyTo(T[] array, int arrayIndex)

Parameters

Type	Name	Description
T[]	array	The one-dimensional System.Array that is the destination of the elements copied from System.Collections.Generic.ICollection<T>. The System.Array must have zero-based indexing.
System.Int32	arrayIndex	The zero-based index in array at which copying begins.

IsFull()

Determines whether this Sparse vector has elements on all indices.

Declaration

public bool IsFull()

Returns

Type	Description
System.Boolean	true if this instance is full; otherwise, false.

ToDense()

Converts this sparse vector to a dense vector of the given length.

Declaration

public T[] ToDense()

Returns

Type	Description
T[]

ToDense(Int32)

Converts this sparse vector to a dense vector of the given length.

Declaration

public T[] ToDense(int length)

Parameters

Type	Name	Description
System.Int32	length

Returns

Type	Description
T[]

ToSparse()

Converts this sparse vector to a sparse representation where the indices are intertwined with their corresponding values.

Declaration

public T[] ToSparse()

Returns

Type	Description
T[]

ToString()

Returns a that represents this instance.

Declaration

public override string ToString()

Returns

Type	Description
System.String	A that represents this instance.

ToString(String, IFormatProvider)

Returns a that represents this instance.

Declaration

public string ToString(string format, IFormatProvider formatProvider)

Parameters

Type	Name	Description
System.String	format	The format.
IFormatProvider	formatProvider	The format provider.

Returns

Type	Description
System.String	A that represents this instance.

Operators

Implicit(Sparse<T> to Array)

Performs an implicit conversion from Sparse<T> to .

Declaration

public static implicit operator Array(Sparse<T> obj)

Parameters

Type	Name	Description
Sparse<T>	obj

Returns

Type	Description
Array

Implements

ICloneable

IList<>

IList

IFormattable

Extension Methods

Matrix.Replace<T>(T, Object, Object)

Matrix.IsEqual(Object, Object, Decimal, Decimal)

EntityBaseExtensions.HasProperty(Object, String)

ArrayExtensions.Concatenate<T>(T, T[])

CollectionExtensions.FromHierarchy<TSource>(TSource, Func<TSource, TSource>, Func<TSource, Boolean>)

CollectionExtensions.FromHierarchy<TSource>(TSource, Func<TSource, TSource>)

ObjectExtensions.Clone<T>(T)

ObjectExtensions.To<T>(Object)

ObjectExtensions.To(Object, Type)

ObjectExtensions.HasMethod(Object, String)

ObjectExtensions.AddressOf<T>(T)

ReflectionExtensions.GetIdentityValue<T>(T)

ReflectionExtensions.GetIdentityValue<T, TResult>(T)

ReflectionExtensions.GetIdentityProperty<T>(T)

ReflectionExtensions.HasIdentityProperty<T>(T)

ReflectionExtensions.GetPropertyValue<T, TResult>(T, String, TResult)

ReflectionExtensions.GetPropertyInfo<T, TValue>(T, Expression<Func<T, TValue>>)

ReflectionExtensions.GetTitleValue<T>(T)

ReflectionExtensions.HasParentIdentityProperty<T>(T)

ReflectionExtensions.GetParentIdentityProperty<T>(T)

ReflectionExtensions.IsFreeApplication<T>(T)