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  • Extreme.Statistics.Multivariate
    • DendrogramNode Class
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    • PrincipalComponent Class
    • PrincipalComponentAnalysis Class
    • PrincipalComponentCollection Class
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  • PrincipalComponent Class
    • Properties
    • Methods

PrincipalComponent Class

Extreme Optimization Numerical Libraries for .NET Professional
Represents a component in a PrincipalComponentAnalysis.
Inheritance Hierarchy

SystemObject
  Extreme.Statistics.MultivariatePrincipalComponent

Namespace:  Extreme.Statistics.Multivariate
Assembly:  Extreme.Numerics (in Extreme.Numerics.dll) Version: 8.1.1
Syntax

C#
VB
C++
F#
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public class PrincipalComponent
Public Class PrincipalComponent
public ref class PrincipalComponent
type PrincipalComponent =  class end

The PrincipalComponent type exposes the following members.

Properties

  NameDescription
Public propertyCumulativeProportionOfVariance
Gets the proportion of variance explained by the component and all more significant components.
Public propertyEigenvalue
Gets the eigenvalue of the component.
Public propertyEigenvalueDifference
Gets the difference between the eigenvalues of the component and the next most significant component.
Public propertyEigenvector
Gets the eigenvector for the component.
Public propertyIndex
Gets the index of the component.
Public propertyModel
Gets the PrincipalComponentAnalysis this component is associated with.
Public propertyProportionOfVariance
Gets the proportion of variance explained by the component.
Public propertyValue
Gets the value of the component.
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Methods

  NameDescription
Public methodEquals
Determines whether the specified object is equal to the current object.
(Inherited from Object.)
Protected methodFinalize
Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.
(Inherited from Object.)
Public methodGetChiSquareTest
Gets a chi square test whether the current component's contribution to the variance is significantly different from all remaining components.
Public methodGetHashCode
Serves as the default hash function.
(Inherited from Object.)
Public methodGetType
Gets the Type of the current instance.
(Inherited from Object.)
Protected methodMemberwiseClone
Creates a shallow copy of the current Object.
(Inherited from Object.)
Public methodToString
Returns a string that represents the current object.
(Inherited from Object.)
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Remarks

Use the PrincipalComponent class to obtain more information about a component in a principal component analysis. The information includes: the Index of the component in the sequence in descending order of contribution to variance explained, the ProportionOfVariance, the CumulativeProportionOfVariance, the Eigenvalue which is an indicator of the absolute size of the contribution, and the EigenvalueDifference which gives the difference between the eigenvalues of this component and the next most significant one.

To get the numerical value of the component, use the Value method, which returns a Vector.

PrincipalComponent objects can not be created directly. They are created by the PrincipalComponentAnalysis object they belong to. They can be retrieved through the Components property of the PrincipalComponent object.

See Also

Reference

Extreme.Statistics.Multivariate Namespace
Extreme.Statistics.MultivariatePrincipalComponentAnalysis

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