diff options
author | julie <julielangou@users.noreply.github.com> | 2011-10-06 06:53:11 +0000 |
---|---|---|
committer | julie <julielangou@users.noreply.github.com> | 2011-10-06 06:53:11 +0000 |
commit | e1d39294aee16fa6db9ba079b14442358217db71 (patch) | |
tree | 30e5aa04c1f6596991fda5334f63dfb9b8027849 /SRC/zla_porpvgrw.f | |
parent | 5fe0466a14e395641f4f8a300ecc9dcb8058081b (diff) | |
download | lapack-e1d39294aee16fa6db9ba079b14442358217db71.tar.gz lapack-e1d39294aee16fa6db9ba079b14442358217db71.tar.bz2 lapack-e1d39294aee16fa6db9ba079b14442358217db71.zip |
Integrating Doxygen in comments
Diffstat (limited to 'SRC/zla_porpvgrw.f')
-rw-r--r-- | SRC/zla_porpvgrw.f | 137 |
1 files changed, 97 insertions, 40 deletions
diff --git a/SRC/zla_porpvgrw.f b/SRC/zla_porpvgrw.f index 1e168fc2..b25d5e47 100644 --- a/SRC/zla_porpvgrw.f +++ b/SRC/zla_porpvgrw.f @@ -1,59 +1,116 @@ - DOUBLE PRECISION FUNCTION ZLA_PORPVGRW( UPLO, NCOLS, A, LDA, AF, - $ LDAF, WORK ) +*> \brief \b ZLA_PORPVGRW * -* -- LAPACK routine (version 3.2.2) -- -* -- Contributed by James Demmel, Deaglan Halligan, Yozo Hida and -- -* -- Jason Riedy of Univ. of California Berkeley. -- -* -- June 2010 -- +* =========== DOCUMENTATION =========== * -* -- LAPACK is a software package provided by Univ. of Tennessee, -- -* -- Univ. of California Berkeley and NAG Ltd. -- +* Online html documentation available at +* http://www.netlib.org/lapack/explore-html/ * - IMPLICIT NONE -* .. -* .. Scalar Arguments .. - CHARACTER*1 UPLO - INTEGER NCOLS, LDA, LDAF -* .. -* .. Array Arguments .. - COMPLEX*16 A( LDA, * ), AF( LDAF, * ) - DOUBLE PRECISION WORK( * ) -* .. +* Definition +* ========== * +* DOUBLE PRECISION FUNCTION ZLA_PORPVGRW( UPLO, NCOLS, A, LDA, AF, +* LDAF, WORK ) +* +* .. Scalar Arguments .. +* CHARACTER*1 UPLO +* INTEGER NCOLS, LDA, LDAF +* .. +* .. Array Arguments .. +* COMPLEX*16 A( LDA, * ), AF( LDAF, * ) +* DOUBLE PRECISION WORK( * ) +* .. +* * Purpose * ======= -* -* ZLA_PORPVGRW computes the reciprocal pivot growth factor -* norm(A)/norm(U). The "max absolute element" norm is used. If this is -* much less than 1, the stability of the LU factorization of the -* (equilibrated) matrix A could be poor. This also means that the -* solution X, estimated condition numbers, and error bounds could be -* unreliable. +* +*>\details \b Purpose: +*>\verbatim +*> +*> ZLA_PORPVGRW computes the reciprocal pivot growth factor +*> norm(A)/norm(U). The "max absolute element" norm is used. If this is +*> much less than 1, the stability of the LU factorization of the +*> (equilibrated) matrix A could be poor. This also means that the +*> solution X, estimated condition numbers, and error bounds could be +*> unreliable. +*> +*>\endverbatim * * Arguments * ========= * -* UPLO (input) CHARACTER*1 -* = 'U': Upper triangle of A is stored; -* = 'L': Lower triangle of A is stored. +*> \param[in] UPLO +*> \verbatim +*> UPLO is CHARACTER*1 +*> = 'U': Upper triangle of A is stored; +*> = 'L': Lower triangle of A is stored. +*> \endverbatim +*> +*> \param[in] NCOLS +*> \verbatim +*> NCOLS is INTEGER +*> The number of columns of the matrix A. NCOLS >= 0. +*> \endverbatim +*> +*> \param[in] A +*> \verbatim +*> A is COMPLEX*16 array, dimension (LDA,N) +*> On entry, the N-by-N matrix A. +*> \endverbatim +*> +*> \param[in] LDA +*> \verbatim +*> LDA is INTEGER +*> The leading dimension of the array A. LDA >= max(1,N). +*> \endverbatim +*> +*> \param[in] AF +*> \verbatim +*> AF is COMPLEX*16 array, dimension (LDAF,N) +*> The triangular factor U or L from the Cholesky factorization +*> A = U**T*U or A = L*L**T, as computed by ZPOTRF. +*> \endverbatim +*> +*> \param[in] LDAF +*> \verbatim +*> LDAF is INTEGER +*> The leading dimension of the array AF. LDAF >= max(1,N). +*> \endverbatim +*> +*> \param[in] WORK +*> \verbatim +*> WORK is COMPLEX*16 array, dimension (2*N) +*> \endverbatim +*> +* +* Authors +* ======= * -* NCOLS (input) INTEGER -* The number of columns of the matrix A. NCOLS >= 0. +*> \author Univ. of Tennessee +*> \author Univ. of California Berkeley +*> \author Univ. of Colorado Denver +*> \author NAG Ltd. * -* A (input) COMPLEX*16 array, dimension (LDA,N) -* On entry, the N-by-N matrix A. +*> \date November 2011 * -* LDA (input) INTEGER -* The leading dimension of the array A. LDA >= max(1,N). +*> \ingroup complex16POcomputational * -* AF (input) COMPLEX*16 array, dimension (LDAF,N) -* The triangular factor U or L from the Cholesky factorization -* A = U**T*U or A = L*L**T, as computed by ZPOTRF. +* ===================================================================== + DOUBLE PRECISION FUNCTION ZLA_PORPVGRW( UPLO, NCOLS, A, LDA, AF, + $ LDAF, WORK ) * -* LDAF (input) INTEGER -* The leading dimension of the array AF. LDAF >= max(1,N). +* -- LAPACK computational routine (version 3.2.2) -- +* -- LAPACK is a software package provided by Univ. of Tennessee, -- +* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- +* November 2011 * -* WORK (input) COMPLEX*16 array, dimension (2*N) +* .. Scalar Arguments .. + CHARACTER*1 UPLO + INTEGER NCOLS, LDA, LDAF +* .. +* .. Array Arguments .. + COMPLEX*16 A( LDA, * ), AF( LDAF, * ) + DOUBLE PRECISION WORK( * ) +* .. * * ===================================================================== * |