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QRDecompositionRank Method (Double)Extreme Optimization Numerical Libraries for .NET Professional
Returns the numerical rank of a matrix using the specified tolerance.

Namespace: Extreme.Mathematics.LinearAlgebra
Assembly: Extreme.Numerics.Net40 (in Extreme.Numerics.Net40.dll) Version: 6.0.16073.0 (6.0.16312.0)
Syntax

C#
VB
C++
F#
Copy
public override int Rank(
	double tolerance
)
Public Overrides Function Rank ( 
	tolerance As Double
) As Integer
public:
virtual int Rank(
	double tolerance
) override
abstract Rank : 
        tolerance : float -> int 
override Rank : 
        tolerance : float -> int 

Parameters

tolerance
Type: SystemDouble
The absolute tolerance used to determine if a matrix component is considered zero.

Return Value

Type: Int32
An integer indicating the numerical rank of the matrix.
Remarks

If tolerance is negative, the default tolerance is used. The default tolerance is equal to the product of the machine precision, the largest dimension of the matrix, and the one-norm of the matrix. The rank is determined by counting the number of diagonal elements of the upper-triangular component of the decomposition whose absolute value is greater than the tolerance.

Version Information

Numerical Libraries

Supported in: 5.x, 4.x
See Also

Reference

QRDecomposition Class
Rank Overload
Extreme.Mathematics.LinearAlgebra Namespace

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