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author | julie <julielangou@users.noreply.github.com> | 2011-10-06 06:53:11 +0000 |
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committer | julie <julielangou@users.noreply.github.com> | 2011-10-06 06:53:11 +0000 |
commit | e1d39294aee16fa6db9ba079b14442358217db71 (patch) | |
tree | 30e5aa04c1f6596991fda5334f63dfb9b8027849 /SRC/dgeql2.f | |
parent | 5fe0466a14e395641f4f8a300ecc9dcb8058081b (diff) | |
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Integrating Doxygen in comments
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-rw-r--r-- | SRC/dgeql2.f | 135 |
1 files changed, 88 insertions, 47 deletions
diff --git a/SRC/dgeql2.f b/SRC/dgeql2.f index 6516c644..b1bace33 100644 --- a/SRC/dgeql2.f +++ b/SRC/dgeql2.f @@ -1,69 +1,110 @@ - SUBROUTINE DGEQL2( M, N, A, LDA, TAU, WORK, INFO ) +*> \brief \b DGEQL2 * -* -- LAPACK routine (version 3.3.1) -- -* -- LAPACK is a software package provided by Univ. of Tennessee, -- -* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- -* -- April 2011 -- +* =========== DOCUMENTATION =========== * -* .. Scalar Arguments .. - INTEGER INFO, LDA, M, N -* .. -* .. Array Arguments .. - DOUBLE PRECISION A( LDA, * ), TAU( * ), WORK( * ) -* .. +* Online html documentation available at +* http://www.netlib.org/lapack/explore-html/ * +* Definition +* ========== +* +* SUBROUTINE DGEQL2( M, N, A, LDA, TAU, WORK, INFO ) +* +* .. Scalar Arguments .. +* INTEGER INFO, LDA, M, N +* .. +* .. Array Arguments .. +* DOUBLE PRECISION A( LDA, * ), TAU( * ), WORK( * ) +* .. +* * Purpose * ======= * -* DGEQL2 computes a QL factorization of a real m by n matrix A: -* A = Q * L. +*>\details \b Purpose: +*>\verbatim +*> +*> DGEQL2 computes a QL factorization of a real m by n matrix A: +*> A = Q * L. +*> +*>\endverbatim * * Arguments * ========= * -* M (input) INTEGER -* The number of rows of the matrix A. M >= 0. -* -* N (input) INTEGER -* The number of columns of the matrix A. N >= 0. -* -* A (input/output) DOUBLE PRECISION array, dimension (LDA,N) -* On entry, the m by n matrix A. -* On exit, if m >= n, the lower triangle of the subarray -* A(m-n+1:m,1:n) contains the n by n lower triangular matrix L; -* if m <= n, the elements on and below the (n-m)-th -* superdiagonal contain the m by n lower trapezoidal matrix L; -* the remaining elements, with the array TAU, represent the -* orthogonal matrix Q as a product of elementary reflectors -* (see Further Details). +*> \param[in] M +*> \verbatim +*> M is INTEGER +*> The number of rows of the matrix A. M >= 0. +*> \endverbatim +*> +*> \param[in] N +*> \verbatim +*> N is INTEGER +*> The number of columns of the matrix A. N >= 0. +*> \endverbatim +*> +* +* Authors +* ======= * -* LDA (input) INTEGER -* The leading dimension of the array A. LDA >= max(1,M). +*> \author Univ. of Tennessee +*> \author Univ. of California Berkeley +*> \author Univ. of Colorado Denver +*> \author NAG Ltd. * -* TAU (output) DOUBLE PRECISION array, dimension (min(M,N)) -* The scalar factors of the elementary reflectors (see Further -* Details). +*> \date November 2011 * -* WORK (workspace) DOUBLE PRECISION array, dimension (N) +*> \ingroup doubleGEcomputational * -* INFO (output) INTEGER -* = 0: successful exit -* < 0: if INFO = -i, the i-th argument had an illegal value * * Further Details * =============== +*>\details \b Further \b Details +*> \verbatim +* (see Further Details). +*> +*> LDA (input) INTEGER +*> The leading dimension of the array A. LDA >= max(1,M). +*> +*> TAU (output) DOUBLE PRECISION array, dimension (min(M,N)) +*> The scalar factors of the elementary reflectors (see Further +*> Details). +*> +*> WORK (workspace) DOUBLE PRECISION array, dimension (N) +*> +*> INFO (output) INTEGER +*> = 0: successful exit +*> < 0: if INFO = -i, the i-th argument had an illegal value +*> +*> +*> The matrix Q is represented as a product of elementary reflectors +*> +*> Q = H(k) . . . H(2) H(1), where k = min(m,n). +*> +*> Each H(i) has the form +*> +*> H(i) = I - tau * v * v**T +*> +*> where tau is a real scalar, and v is a real vector with +*> v(m-k+i+1:m) = 0 and v(m-k+i) = 1; v(1:m-k+i-1) is stored on exit in +*> A(1:m-k+i-1,n-k+i), and tau in TAU(i). +*> +*> \endverbatim +*> +* ===================================================================== + SUBROUTINE DGEQL2( M, N, A, LDA, TAU, WORK, INFO ) * -* The matrix Q is represented as a product of elementary reflectors -* -* Q = H(k) . . . H(2) H(1), where k = min(m,n). -* -* Each H(i) has the form -* -* H(i) = I - tau * v * v**T +* -- LAPACK computational routine (version 3.3.1) -- +* -- LAPACK is a software package provided by Univ. of Tennessee, -- +* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- +* November 2011 * -* where tau is a real scalar, and v is a real vector with -* v(m-k+i+1:m) = 0 and v(m-k+i) = 1; v(1:m-k+i-1) is stored on exit in -* A(1:m-k+i-1,n-k+i), and tau in TAU(i). +* .. Scalar Arguments .. + INTEGER INFO, LDA, M, N +* .. +* .. Array Arguments .. + DOUBLE PRECISION A( LDA, * ), TAU( * ), WORK( * ) +* .. * * ===================================================================== * |