Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

## org.netlib.lapack
Class Sorghr

    java.lang.Object
      org.netlib.lapack.Sorghr

    public class Sorghr

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
     *  =======
     *
     *  SORGHR generates a real orthogonal matrix Q which is defined as the
     *  product of IHI-ILO elementary reflectors of order N, as returned by
     *  SGEHRD:
     *
     *  Q = H(ilo) H(ilo+1) . . . H(ihi-1).
     *
     *  Arguments
     *  =========
     *
     *  N       (input) INTEGER
     *          The order of the matrix Q. N >= 0.
     *
     *  ILO     (input) INTEGER
     *  IHI     (input) INTEGER
     *          ILO and IHI must have the same values as in the previous call
     *          of SGEHRD. Q is equal to the unit matrix except in the
     *          submatrix Q(ilo+1:ihi,ilo+1:ihi).
     *          1 <= ILO <= IHI <= N, if N > 0; ILO=1 and IHI=0, if N=0.
     *
     *  A       (input/output) REAL array, dimension (LDA,N)
     *          On entry, the vectors which define the elementary reflectors,
     *          as returned by SGEHRD.
     *          On exit, the N-by-N orthogonal matrix Q.
     *
     *  LDA     (input) INTEGER
     *          The leading dimension of the array A. LDA >= max(1,N).
     *
     *  TAU     (input) REAL array, dimension (N-1)
     *          TAU(i) must contain the scalar factor of the elementary
     *          reflector H(i), as returned by SGEHRD.
     *
     *  WORK    (workspace/output) REAL array, dimension (MAX(1,LWORK))
     *          On exit, if INFO = 0, WORK(1) returns the optimal LWORK.
     *
     *  LWORK   (input) INTEGER
     *          The dimension of the array WORK. LWORK >= IHI-ILO.
     *          For optimum performance LWORK >= (IHI-ILO)*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 had an illegal value
     *
     *  =====================================================================
     *
     *     .. Parameters ..

Constructor Summary
`Sorghr()`

Method Summary
`static void` | `sorghr(int n, int ilo, int ihi, 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

### Sorghr

    public Sorghr()

Method Detail

### sorghr

    public static void sorghr(int n,
                              int ilo,
                              int ihi,
                              float[] a,
                              int _a_offset,
                              int lda,
                              float[] tau,
                              int _tau_offset,
                              float[] work,
                              int _work_offset,
                              int lwork,
                              intW info)

Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD