org.netlib.lapack
Class SLAED5
java.lang.Object
org.netlib.lapack.SLAED5
public class SLAED5
- extends java.lang.Object
SLAED5 is a simplified interface to the JLAPACK routine slaed5.
This interface converts Java-style 2D row-major arrays into
the 1D column-major linearized arrays expected by the lower
level JLAPACK routines. Using this interface also allows you
to omit offset and leading dimension arguments. However, because
of these conversions, these routines will be slower than the low
level ones. Following is the description from the original Fortran
source. Contact seymour@cs.utk.edu with any questions.
* ..
*
* Purpose
* =======
*
* This subroutine computes the I-th eigenvalue of a symmetric rank-one
* modification of a 2-by-2 diagonal matrix
*
* diag( D ) + RHO * Z * transpose(Z) .
*
* The diagonal elements in the array D are assumed to satisfy
*
* D(i) < D(j) for i < j .
*
* We also assume RHO > 0 and that the Euclidean norm of the vector
* Z is one.
*
* Arguments
* =========
*
* I (input) INTEGER
* The index of the eigenvalue to be computed. I = 1 or I = 2.
*
* D (input) REAL array, dimension (2)
* The original eigenvalues. We assume D(1) < D(2).
*
* Z (input) REAL array, dimension (2)
* The components of the updating vector.
*
* DELTA (output) REAL array, dimension (2)
* The vector DELTA contains the information necessary
* to construct the eigenvectors.
*
* RHO (input) REAL
* The scalar in the symmetric updating formula.
*
* DLAM (output) REAL
* The computed lambda_I, the I-th updated eigenvalue.
*
* Further Details
* ===============
*
* Based on contributions by
* Ren-Cang Li, Computer Science Division, University of California
* at Berkeley, USA
*
* =====================================================================
*
* .. Parameters ..
Method Summary |
static void |
SLAED5(int i,
float[] d,
float[] z,
float[] delta,
float rho,
floatW dlam)
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
SLAED5
public SLAED5()
SLAED5
public static void SLAED5(int i,
float[] d,
float[] z,
float[] delta,
float rho,
floatW dlam)