From 8c8d2f518968ce7057eec6aa5cd5aec8faab861a Mon Sep 17 00:00:00 2001 From: jofret Date: Tue, 28 Apr 2009 07:17:00 +0000 Subject: Moving lapack to right place --- src/lib/lapack/dgerq2.f | 122 ------------------------------------------------ 1 file changed, 122 deletions(-) delete mode 100644 src/lib/lapack/dgerq2.f (limited to 'src/lib/lapack/dgerq2.f') diff --git a/src/lib/lapack/dgerq2.f b/src/lib/lapack/dgerq2.f deleted file mode 100644 index 4dfe8b0f..00000000 --- a/src/lib/lapack/dgerq2.f +++ /dev/null @@ -1,122 +0,0 @@ - SUBROUTINE DGERQ2( M, N, A, LDA, TAU, WORK, INFO ) -* -* -- LAPACK routine (version 3.1) -- -* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. -* November 2006 -* -* .. Scalar Arguments .. - INTEGER INFO, LDA, M, N -* .. -* .. Array Arguments .. - DOUBLE PRECISION A( LDA, * ), TAU( * ), WORK( * ) -* .. -* -* Purpose -* ======= -* -* DGERQ2 computes an RQ factorization of a real m by n matrix A: -* A = R * Q. -* -* 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 upper triangle of the subarray -* A(1:m,n-m+1:n) contains the m by m upper triangular matrix R; -* if m >= n, the elements on and above the (m-n)-th subdiagonal -* contain the m by n upper trapezoidal matrix R; the remaining -* elements, with the array TAU, represent the orthogonal matrix -* Q as a product of elementary reflectors (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 (M) -* -* INFO (output) INTEGER -* = 0: successful exit -* < 0: if INFO = -i, the i-th argument had an illegal value -* -* Further Details -* =============== -* -* The matrix Q is represented as a product of elementary reflectors -* -* Q = H(1) H(2) . . . H(k), where k = min(m,n). -* -* Each H(i) has the form -* -* H(i) = I - tau * v * v' -* -* where tau is a real scalar, and v is a real vector with -* v(n-k+i+1:n) = 0 and v(n-k+i) = 1; v(1:n-k+i-1) is stored on exit in -* A(m-k+i,1:n-k+i-1), and tau in TAU(i). -* -* ===================================================================== -* -* .. Parameters .. - DOUBLE PRECISION ONE - PARAMETER ( ONE = 1.0D+0 ) -* .. -* .. Local Scalars .. - INTEGER I, K - DOUBLE PRECISION AII -* .. -* .. External Subroutines .. - EXTERNAL DLARF, DLARFG, XERBLA -* .. -* .. Intrinsic Functions .. - INTRINSIC MAX, MIN -* .. -* .. Executable Statements .. -* -* Test the input arguments -* - INFO = 0 - IF( M.LT.0 ) THEN - INFO = -1 - ELSE IF( N.LT.0 ) THEN - INFO = -2 - ELSE IF( LDA.LT.MAX( 1, M ) ) THEN - INFO = -4 - END IF - IF( INFO.NE.0 ) THEN - CALL XERBLA( 'DGERQ2', -INFO ) - RETURN - END IF -* - K = MIN( M, N ) -* - DO 10 I = K, 1, -1 -* -* Generate elementary reflector H(i) to annihilate -* A(m-k+i,1:n-k+i-1) -* - CALL DLARFG( N-K+I, A( M-K+I, N-K+I ), A( M-K+I, 1 ), LDA, - $ TAU( I ) ) -* -* Apply H(i) to A(1:m-k+i-1,1:n-k+i) from the right -* - AII = A( M-K+I, N-K+I ) - A( M-K+I, N-K+I ) = ONE - CALL DLARF( 'Right', M-K+I-1, N-K+I, A( M-K+I, 1 ), LDA, - $ TAU( I ), A, LDA, WORK ) - A( M-K+I, N-K+I ) = AII - 10 CONTINUE - RETURN -* -* End of DGERQ2 -* - END -- cgit