org.netlib.lapack
Class SLAGTM

java.lang.Object
  extended by org.netlib.lapack.SLAGTM

public class SLAGTM
extends java.lang.Object

SLAGTM is a simplified interface to the JLAPACK routine slagtm.
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 * ======= * * SLAGTM performs a matrix-vector product of the form * * B := alpha * A * X + beta * B * * where A is a tridiagonal matrix of order N, B and X are N by NRHS * matrices, and alpha and beta are real scalars, each of which may be * 0., 1., or -1. * * Arguments * ========= * * TRANS (input) CHARACTER * Specifies the operation applied to A. * = 'N': No transpose, B := alpha * A * X + beta * B * = 'T': Transpose, B := alpha * A'* X + beta * B * = 'C': Conjugate transpose = Transpose * * N (input) INTEGER * The order of the matrix A. N >= 0. * * NRHS (input) INTEGER * The number of right hand sides, i.e., the number of columns * of the matrices X and B. * * ALPHA (input) REAL * The scalar alpha. ALPHA must be 0., 1., or -1.; otherwise, * it is assumed to be 0. * * DL (input) REAL array, dimension (N-1) * The (n-1) sub-diagonal elements of T. * * D (input) REAL array, dimension (N) * The diagonal elements of T. * * DU (input) REAL array, dimension (N-1) * The (n-1) super-diagonal elements of T. * * X (input) REAL array, dimension (LDX,NRHS) * The N by NRHS matrix X. * LDX (input) INTEGER * The leading dimension of the array X. LDX >= max(N,1). * * BETA (input) REAL * The scalar beta. BETA must be 0., 1., or -1.; otherwise, * it is assumed to be 1. * * B (input/output) REAL array, dimension (LDB,NRHS) * On entry, the N by NRHS matrix B. * On exit, B is overwritten by the matrix expression * B := alpha * A * X + beta * B. * * LDB (input) INTEGER * The leading dimension of the array B. LDB >= max(N,1). * * ===================================================================== * * .. Parameters ..


Constructor Summary
SLAGTM()
           
 
Method Summary
static void SLAGTM(java.lang.String trans, int n, int nrhs, float alpha, float[] dl, float[] d, float[] du, float[][] x, float beta, float[][] b)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SLAGTM

public SLAGTM()
Method Detail

SLAGTM

public static void SLAGTM(java.lang.String trans,
                          int n,
                          int nrhs,
                          float alpha,
                          float[] dl,
                          float[] d,
                          float[] du,
                          float[][] x,
                          float beta,
                          float[][] b)