GenericDecompositionOperations<T>.LUEstimateCondition Method

ZGECON estimates the reciprocal of the condition number of a general real matrix A, inthis. either the 1-norm or the infinity-norm, using the LU decomposition computed by ZGETRF. An estimate is obtained for norm(inv(A)), and the reciprocal of the condition number is computed as RCOND = 1 / ( norm(A) * norm(inv(A)) ). Arguments ========= NORM (input) CHARACTER*1 Specifies whether the 1-norm condition number or the infinity-norm condition number is required: = '1' or 'O': 1-norm; = 'I': Infinity-norm. N (input) INTEGER The elementOrder of the matrix A. N >= 0. A (input) DOUBLE PRECISION array, dimension (LDA,N) The factors L and U from the decomposition A = P*L*U as computed by ZGETRF. LDA (input) INTEGER The leading dimension of the array A. LDA >= Max(1,N). ANORM (input) DOUBLE PRECISION If NORM = '1' or 'O', the 1-norm of the original matrix A. If NORM = 'I', the infinity-norm of the original matrix A. RCOND (output) DOUBLE PRECISION The reciprocal of the condition number of the matrix A, computed as RCOND = 1/(norm(A) * norm(inv(A))). WORK (workspace) DOUBLE PRECISION array, dimension (4*N) IWORK (workspace) INTEGER array, dimension (N) INFO (output) INTEGER = 0: successful exit < 0: if INFO = -i, the i-th argument had an illegal value

public override void LUEstimateCondition(
	MatrixNorm norm,
	int n,
	Span<T> a,
	int lda,
	T anorm,
	out T rcond,
	out int info
)

Public Overrides Sub LUEstimateCondition ( 
	norm As MatrixNorm,
	n As Integer,
	a As Span(Of T),
	lda As Integer,
	anorm As T,
	<OutAttribute> ByRef rcond As T,
	<OutAttribute> ByRef info As Integer
)

public:
virtual void LUEstimateCondition(
	MatrixNorm norm, 
	int n, 
	Span<T> a, 
	int lda, 
	T anorm, 
	[OutAttribute] T% rcond, 
	[OutAttribute] int% info
) override

abstract LUEstimateCondition : 
        norm : MatrixNorm * 
        n : int * 
        a : Span<'T> * 
        lda : int * 
        anorm : 'T * 
        rcond : 'T byref * 
        info : int byref -> unit 
override LUEstimateCondition : 
        norm : MatrixNorm * 
        n : int * 
        a : Span<'T> * 
        lda : int * 
        anorm : 'T * 
        rcond : 'T byref * 
        info : int byref -> unit 

ZGECON estimates the reciprocal of the condition number of a general real matrix A, inthis. either the 1-norm or the infinity-norm, using the LU decomposition computed by ZGETRF. An estimate is obtained for norm(inv(A)), and the reciprocal of the condition number is computed as RCOND = 1 / ( norm(A) * norm(inv(A)) ). Arguments ========= NORM (input) CHARACTER*1 Specifies whether the 1-norm condition number or the infinity-norm condition number is required: = '1' or 'O': 1-norm; = 'I': Infinity-norm. N (input) INTEGER The elementOrder of the matrix A. N >= 0. A (input) DOUBLE PRECISION array, dimension (LDA,N) The factors L and U from the decomposition A = P*L*U as computed by ZGETRF. LDA (input) INTEGER The leading dimension of the array A. LDA >= Max(1,N). ANORM (input) DOUBLE PRECISION If NORM = '1' or 'O', the 1-norm of the original matrix A. If NORM = 'I', the infinity-norm of the original matrix A. RCOND (output) DOUBLE PRECISION The reciprocal of the condition number of the matrix A, computed as RCOND = 1/(norm(A) * norm(inv(A))). WORK (workspace) DOUBLE PRECISION array, dimension (4*N) IWORK (workspace) INTEGER array, dimension (N) INFO (output) INTEGER = 0: successful exit < 0: if INFO = -i, the i-th argument had an illegal value

public override void LUEstimateCondition(
	MatrixNorm norm,
	int n,
	Span<Complex<T>> a,
	int lda,
	T anorm,
	out T rcond,
	out int info
)

Public Overrides Sub LUEstimateCondition ( 
	norm As MatrixNorm,
	n As Integer,
	a As Span(Of Complex(Of T)),
	lda As Integer,
	anorm As T,
	<OutAttribute> ByRef rcond As T,
	<OutAttribute> ByRef info As Integer
)

public:
virtual void LUEstimateCondition(
	MatrixNorm norm, 
	int n, 
	Span<Complex<T>> a, 
	int lda, 
	T anorm, 
	[OutAttribute] T% rcond, 
	[OutAttribute] int% info
) override

abstract LUEstimateCondition : 
        norm : MatrixNorm * 
        n : int * 
        a : Span<Complex<'T>> * 
        lda : int * 
        anorm : 'T * 
        rcond : 'T byref * 
        info : int byref -> unit 
override LUEstimateCondition : 
        norm : MatrixNorm * 
        n : int * 
        a : Span<Complex<'T>> * 
        lda : int * 
        anorm : 'T * 
        rcond : 'T byref * 
        info : int byref -> unit