dlaqr1.f – Synopsis Functions/Subroutines subroutine dlaqr1 (N, H, LDH, SR1, SI1, SR2, SI2, V) DLAQR1 sets a scalar multiple of the first column of the product of 2-by-2 or 3-by-3 matrix H and specified shifts. Function/Subroutine Documentation subroutine dlaqr1 (integerN, double precision, dimension( ldh, * )H, integerLDH, double precisionSR1, double precisionSI1, double precisionSR2, double precisionSI2,…
dlaqr0.f – Synopsis Functions/Subroutines subroutine dlaqr0 (WANTT, WANTZ, N, ILO, IHI, H, LDH, WR, WI, ILOZ, IHIZ, Z, LDZ, WORK, LWORK, INFO) DLAQR0 computes the eigenvalues of a Hessenberg matrix, and optionally the matrices from the Schur decomposition. Function/Subroutine Documentation subroutine dlaqr0 (logicalWANTT, logicalWANTZ, integerN, integerILO, integerIHI, double precision, dimension( ldh, * )H, integerLDH, double…
dlaqps.f – Synopsis Functions/Subroutines subroutine dlaqps (M, N, OFFSET, NB, KB, A, LDA, JPVT, TAU, VN1, VN2, AUXV, F, LDF) DLAQPS computes a step of QR factorization with column pivoting of a real m-by-n matrix A by using BLAS level 3. Function/Subroutine Documentation subroutine dlaqps (integerM, integerN, integerOFFSET, integerNB, integerKB, double precision, dimension( lda, *…
dlaqp2.f – Synopsis Functions/Subroutines subroutine dlaqp2 (M, N, OFFSET, A, LDA, JPVT, TAU, VN1, VN2, WORK) DLAQP2 computes a QR factorization with column pivoting of the matrix block. Function/Subroutine Documentation subroutine dlaqp2 (integerM, integerN, integerOFFSET, double precision, dimension( lda, * )A, integerLDA, integer, dimension( * )JPVT, double precision, dimension( * )TAU, double precision, dimension( *…
dlaqge.f – Synopsis Functions/Subroutines subroutine dlaqge (M, N, A, LDA, R, C, ROWCND, COLCND, AMAX, EQUED) DLAQGE scales a general rectangular matrix, using row and column scaling factors computed by sgeequ. Function/Subroutine Documentation subroutine dlaqge (integerM, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( * )R, double precision, dimension( * )C, double…
dlaqgb.f – Synopsis Functions/Subroutines subroutine dlaqgb (M, N, KL, KU, AB, LDAB, R, C, ROWCND, COLCND, AMAX, EQUED) DLAQGB scales a general band matrix, using row and column scaling factors computed by sgbequ. Function/Subroutine Documentation subroutine dlaqgb (integerM, integerN, integerKL, integerKU, double precision, dimension( ldab, * )AB, integerLDAB, double precision, dimension( * )R, double precision,…
dlapy3.f – Synopsis Functions/Subroutines DOUBLE PRECISION function dlapy3 (X, Y, Z) DLAPY3 returns sqrt(x2+y2+z2). Function/Subroutine Documentation DOUBLE PRECISION function dlapy3 (double precisionX, double precisionY, double precisionZ) DLAPY3 returns sqrt(x2+y2+z2). Purpose: DLAPY3 returns sqrt(x**2+y**2+z**2), taking care not to cause unnecessary overflow. Parameters: X X is DOUBLE PRECISION Y Y is DOUBLE PRECISION Z Z is…
dlapy2.f – Synopsis Functions/Subroutines DOUBLE PRECISION function dlapy2 (X, Y) DLAPY2 returns sqrt(x2+y2). Function/Subroutine Documentation DOUBLE PRECISION function dlapy2 (double precisionX, double precisionY) DLAPY2 returns sqrt(x2+y2). Purpose: DLAPY2 returns sqrt(x**2+y**2), taking care not to cause unnecessary overflow. Parameters: X X is DOUBLE PRECISION Y Y is DOUBLE PRECISION X and Y specify the values…
dlapmt.f – Synopsis Functions/Subroutines subroutine dlapmt (FORWRD, M, N, X, LDX, K) DLAPMT performs a forward or backward permutation of the columns of a matrix. Function/Subroutine Documentation subroutine dlapmt (logicalFORWRD, integerM, integerN, double precision, dimension( ldx, * )X, integerLDX, integer, dimension( * )K) DLAPMT performs a forward or backward permutation of the columns of a…
dlapmr.f – Synopsis Functions/Subroutines subroutine dlapmr (FORWRD, M, N, X, LDX, K) DLAPMR rearranges rows of a matrix as specified by a permutation vector. Function/Subroutine Documentation subroutine dlapmr (logicalFORWRD, integerM, integerN, double precision, dimension( ldx, * )X, integerLDX, integer, dimension( * )K) DLAPMR rearranges rows of a matrix as specified by a permutation vector. Purpose:…
dlapll.f – Synopsis Functions/Subroutines subroutine dlapll (N, X, INCX, Y, INCY, SSMIN) DLAPLL measures the linear dependence of two vectors. Function/Subroutine Documentation subroutine dlapll (integerN, double precision, dimension( * )X, integerINCX, double precision, dimension( * )Y, integerINCY, double precisionSSMIN) DLAPLL measures the linear dependence of two vectors. Purpose: Given two column vectors X and Y,…
dlanv2.f – Synopsis Functions/Subroutines subroutine dlanv2 (A, B, C, D, RT1R, RT1I, RT2R, RT2I, CS, SN) DLANV2 computes the Schur factorization of a real 2-by-2 nonsymmetric matrix in standard form. Function/Subroutine Documentation subroutine dlanv2 (double precisionA, double precisionB, double precisionC, double precisionD, double precisionRT1R, double precisionRT1I, double precisionRT2R, double precisionRT2I, double precisionCS, double precisionSN) DLANV2…
dlantr.f – Synopsis Functions/Subroutines DOUBLE PRECISION function dlantr (NORM, UPLO, DIAG, M, N, A, LDA, WORK) DLANTR returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a trapezoidal or triangular matrix. Function/Subroutine Documentation DOUBLE PRECISION function dlantr (characterNORM, characterUPLO, characterDIAG, integerM, integerN,…
dlantp.f – Synopsis Functions/Subroutines DOUBLE PRECISION function dlantp (NORM, UPLO, DIAG, N, AP, WORK) DLANTP returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a triangular matrix supplied in packed form. Function/Subroutine Documentation DOUBLE PRECISION function dlantp (characterNORM, characterUPLO, characterDIAG, integerN, double…
dlantb.f – Synopsis Functions/Subroutines DOUBLE PRECISION function dlantb (NORM, UPLO, DIAG, N, K, AB, LDAB, WORK) DLANTB returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a triangular band matrix. Function/Subroutine Documentation DOUBLE PRECISION function dlantb (characterNORM, characterUPLO, characterDIAG, integerN, integerK, double…
dlansy.f – Synopsis Functions/Subroutines DOUBLE PRECISION function dlansy (NORM, UPLO, N, A, LDA, WORK) DLANSY returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a real symmetric matrix. Function/Subroutine Documentation DOUBLE PRECISION function dlansy (characterNORM, characterUPLO, integerN, double precision, dimension( lda, *…
dlanst.f – Synopsis Functions/Subroutines DOUBLE PRECISION function dlanst (NORM, N, D, E) DLANST returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a real symmetric tridiagonal matrix. Function/Subroutine Documentation DOUBLE PRECISION function dlanst (characterNORM, integerN, double precision, dimension( * )D, double precision,…
dlansp.f – Synopsis Functions/Subroutines DOUBLE PRECISION function dlansp (NORM, UPLO, N, AP, WORK) DLANSP returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a symmetric matrix supplied in packed form. Function/Subroutine Documentation DOUBLE PRECISION function dlansp (characterNORM, characterUPLO, integerN, double precision, dimension(…
dlansf.f – Synopsis Functions/Subroutines DOUBLE PRECISION function dlansf (NORM, TRANSR, UPLO, N, A, WORK) DLANSF returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a symmetric matrix in RFP format. Function/Subroutine Documentation DOUBLE PRECISION function dlansf (characterNORM, characterTRANSR, characterUPLO, integerN, double precision,…
dlansb.f – Synopsis Functions/Subroutines DOUBLE PRECISION function dlansb (NORM, UPLO, N, K, AB, LDAB, WORK) DLANSB returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a symmetric band matrix. Function/Subroutine Documentation DOUBLE PRECISION function dlansb (characterNORM, characterUPLO, integerN, integerK, double precision, dimension(…