org.netlib.lapack
Class SORG2R

java.lang.Object
  extended by org.netlib.lapack.SORG2R

public class SORG2R
extends java.lang.Object

SORG2R is a simplified interface to the JLAPACK routine sorg2r.
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 * ======= * * SORG2R generates an m by n real matrix Q with orthonormal columns, * which is defined as the first n columns of a product of k elementary * reflectors of order m * * Q = H(1) H(2) . . . H(k) * * as returned by SGEQRF. * * Arguments * ========= * * M (input) INTEGER * The number of rows of the matrix Q. M >= 0. * * N (input) INTEGER * The number of columns of the matrix Q. M >= N >= 0. * * K (input) INTEGER * The number of elementary reflectors whose product defines the * matrix Q. N >= K >= 0. * * A (input/output) REAL array, dimension (LDA,N) * On entry, the i-th column must contain the vector which * defines the elementary reflector H(i), for i = 1,2,...,k, as * returned by SGEQRF in the first k columns of its array * argument A. * On exit, the m-by-n matrix Q. * * LDA (input) INTEGER * The first dimension of the array A. LDA >= max(1,M). * * TAU (input) REAL array, dimension (K) * TAU(i) must contain the scalar factor of the elementary * reflector H(i), as returned by SGEQRF. * * WORK (workspace) REAL array, dimension (N) * * INFO (output) INTEGER * = 0: successful exit * < 0: if INFO = -i, the i-th argument has an illegal value * * ===================================================================== * * .. Parameters ..


Constructor Summary
SORG2R()
           
 
Method Summary
static void SORG2R(int m, int n, int k, float[][] a, float[] tau, float[] work, intW info)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SORG2R

public SORG2R()
Method Detail

SORG2R

public static void SORG2R(int m,
                          int n,
                          int k,
                          float[][] a,
                          float[] tau,
                          float[] work,
                          intW info)