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DLAPLLRun Method

Purpose ======= Given two column vectors X and Y, let A = ( X Y ). The subroutine first computes the QR factorization of A = Q*R, and then computes the SVD of the 2-by-2 upper triangular matrix R. The smaller singular value of R is returned in SSMIN, which is used as the measurement of the linear dependency of the vectors X and Y.

Namespace: DotNumerics.LinearAlgebra.CSLapack
Assembly: DWSIM.MathOps.DotNumerics (in DWSIM.MathOps.DotNumerics.dll) Version: 1.0.0.0 (1.0.0.0)
Syntax
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public void Run(
	int N,
	ref double[] X,
	int offset_x,
	int INCX,
	ref double[] Y,
	int offset_y,
	int INCY,
	ref double SSMIN
)
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Parameters

N  Int32
(input) INTEGER The length of the vectors X and Y.
X  Double
(input/output) DOUBLE PRECISION array, dimension (1+(N-1)*INCX) On entry, X contains the N-vector X. On exit, X is overwritten.
offset_x  Int32
 
INCX  Int32
(input) INTEGER The increment between successive elements of X. INCX .GT. 0.
Y  Double
(input/output) DOUBLE PRECISION array, dimension (1+(N-1)*INCY) On entry, Y contains the N-vector Y. On exit, Y is overwritten.
offset_y  Int32
 
INCY  Int32
(input) INTEGER The increment between successive elements of Y. INCY .GT. 0.
SSMIN  Double
(output) DOUBLE PRECISION The smallest singular value of the N-by-2 matrix A = ( X Y ).
See Also