Class SPTTS2

  extended by org.netlib.lapack.SPTTS2

public class SPTTS2
extends java.lang.Object

SPTTS2 is a simplified interface to the JLAPACK routine sptts2.
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 with any questions.

* .. * * Purpose * ======= * * SPTTS2 solves a tridiagonal system of the form * A * X = B * using the L*D*L' factorization of A computed by SPTTRF. D is a * diagonal matrix specified in the vector D, L is a unit bidiagonal * matrix whose subdiagonal is specified in the vector E, and X and B * are N by NRHS matrices. * * Arguments * ========= * * N (input) INTEGER * The order of the tridiagonal matrix A. N >= 0. * * NRHS (input) INTEGER * The number of right hand sides, i.e., the number of columns * of the matrix B. NRHS >= 0. * * D (input) REAL array, dimension (N) * The n diagonal elements of the diagonal matrix D from the * L*D*L' factorization of A. * * E (input) REAL array, dimension (N-1) * The (n-1) subdiagonal elements of the unit bidiagonal factor * L from the L*D*L' factorization of A. E can also be regarded * as the superdiagonal of the unit bidiagonal factor U from the * factorization A = U'*D*U. * * B (input/output) REAL array, dimension (LDB,NRHS) * On entry, the right hand side vectors B for the system of * linear equations. * On exit, the solution vectors, X. * * LDB (input) INTEGER * The leading dimension of the array B. LDB >= max(1,N). * * ===================================================================== * * .. Local Scalars ..

Constructor Summary
Method Summary
static void SPTTS2(int n, int nrhs, float[] d, float[] e, float[][] b)
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail


public SPTTS2()
Method Detail


public static void SPTTS2(int n,
                          int nrhs,
                          float[] d,
                          float[] e,
                          float[][] b)