org.netlib.lapack
Class Sorgrq

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

public class Sorgrq
extends java.lang.Object

Following is the description from the original
Fortran source.  For each array argument, the Java
version will include an integer offset parameter, so
the arguments may not match the description exactly.
Contact seymour@cs.utk.edu with any questions.

* .. * * Purpose * ======= * * SORGRQ generates an M-by-N real matrix Q with orthonormal rows, * which is defined as the last M rows of a product of K elementary * reflectors of order N * * Q = H(1) H(2) . . . H(k) * * as returned by SGERQF. * * 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. N >= M. * * K (input) INTEGER * The number of elementary reflectors whose product defines the * matrix Q. M >= K >= 0. * * A (input/output) REAL array, dimension (LDA,N) * On entry, the (m-k+i)-th row must contain the vector which * defines the elementary reflector H(i), for i = 1,2,...,k, as * returned by SGERQF in the last k rows 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 SGERQF. * * WORK (workspace/output) REAL array, dimension (LWORK) * On exit, if INFO = 0, WORK(1) returns the optimal LWORK. * * LWORK (input) INTEGER * The dimension of the array WORK. LWORK >= max(1,M). * For optimum performance LWORK >= M*NB, where NB is the * optimal blocksize. * * If LWORK = -1, then a workspace query is assumed; the routine * only calculates the optimal size of the WORK array, returns * this value as the first entry of the WORK array, and no error * message related to LWORK is issued by XERBLA. * * INFO (output) INTEGER * = 0: successful exit * < 0: if INFO = -i, the i-th argument has an illegal value * * ===================================================================== * * .. Parameters ..


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

Constructor Detail

Sorgrq

public Sorgrq()
Method Detail

sorgrq

public static void sorgrq(int m,
                          int n,
                          int k,
                          float[] a,
                          int _a_offset,
                          int lda,
                          float[] tau,
                          int _tau_offset,
                          float[] work,
                          int _work_offset,
                          int lwork,
                          intW info)