Class Sparse

Extension methods for sparse vectors.
Inheritance
System.Object
Sparse
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.ToString()
Namespace: Mars.Numerics
Assembly: Mars.Numerics.dll
Syntax
public static class Sparse

Methods

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Columns<T>(Sparse<T>[])

Gets the maximum number of columns (dimensions) that can be inferred from the given sparse vectors.
Declaration
public static int Columns<T>(this Sparse<T>[] inputs)
    where T : IEquatable<T>
Parameters
Type Name Description
Sparse<T>[] inputs
Returns
Type Description
System.Int32
Type Parameters
Name Description
T
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FromDense<T>(T[], Boolean)

Creates a sparse vector from a dense array.
Declaration
public static Sparse<T> FromDense<T>(T[] dense, bool removeZeros = true)
    where T : IEquatable<T>
Parameters
Type Name Description
T[] dense
System.Boolean removeZeros
Returns
Type Description
Sparse<T>
Type Parameters
Name Description
T
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FromDense<T>(T[][], Boolean)

Creates sparse vectors from dense arrays.
Declaration
public static Sparse<T>[] FromDense<T>(T[][] dense, bool removeZeros = true)
    where T : IEquatable<T>
Parameters
Type Name Description
T[][] dense
System.Boolean removeZeros
Returns
Type Description
Sparse<T>[]
Type Parameters
Name Description
T
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Parse(String, Nullable<Double>)

Parses a string containing a sparse array in LibSVM format into a Sparse<T> vector.
Declaration
public static Sparse<double> Parse(string values, double? insertValueAtBeginning = null)
Parameters
Type Name Description
System.String values An array of "index:value" strings indicating where each value belongs in the sparse vector.
System.Nullable<System.Double> insertValueAtBeginning Whether an intercept term should be added at the beginning of the vector.
Returns
Type Description
Sparse<System.Double>
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Parse(String[], Nullable<Double>, CultureInfo)

Parses a string containing a sparse array in LibSVM format into a Sparse<T> vector.
Declaration
public static Sparse<double> Parse(string[] values, double? insertValueAtBeginning = null, CultureInfo cultureInfo = null)
Parameters
Type Name Description
System.String[] values An array of "index:value" strings indicating where each value belongs in the sparse vector.
System.Nullable<System.Double> insertValueAtBeginning Whether an intercept term should be added at the beginning of the vector.
System.Globalization.CultureInfo cultureInfo The culture when parsing numbers e.g. comma for decimal or dot.
Returns
Type Description
Sparse<System.Double>