Section 3: library functions
NAME 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….
NAME 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…
NAME 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)…
NAME 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,…
NAME 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,…
NAME 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,…
NAME 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,…
NAME 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…
NAME 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,…
NAME 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…
NAME 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,…
NAME dlanhs.f – SYNOPSIS Functions/Subroutines DOUBLE PRECISION function dlanhs (NORM, N, A, LDA, WORK) DLANHS returns the value of the 1-norm, Frobenius norm, infinity-norm, or the largest absolute value of any element of an upper Hessenberg matrix. Function/Subroutine Documentation DOUBLE PRECISION function dlanhs (characterNORM, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension(…
NAME dlangt.f – SYNOPSIS Functions/Subroutines DOUBLE PRECISION function dlangt (NORM, N, DL, D, DU) DLANGT returns the value of the 1-norm, Frobenius norm, infinity-norm, or the largest absolute value of any element of a general tridiagonal matrix. Function/Subroutine Documentation DOUBLE PRECISION function dlangt (characterNORM, integerN, double precision, dimension( * )DL, double precision, dimension( * )D,…
NAME dlange.f – SYNOPSIS Functions/Subroutines DOUBLE PRECISION function dlange (NORM, M, N, A, LDA, WORK) DLANGE returns the value of the 1-norm, Frobenius norm, infinity-norm, or the largest absolute value of any element of a general rectangular matrix. Function/Subroutine Documentation DOUBLE PRECISION function dlange (characterNORM, integerM, integerN, double precision, dimension( lda, * )A, integerLDA, double…
NAME dlangb.f – SYNOPSIS Functions/Subroutines DOUBLE PRECISION function dlangb (NORM, N, KL, KU, AB, LDAB, WORK) DLANGB returns the value of the 1-norm, Frobenius norm, infinity-norm, or the largest absolute value of any element of general band matrix. Function/Subroutine Documentation DOUBLE PRECISION function dlangb (characterNORM, integerN, integerKL, integerKU, double precision, dimension( ldab, * )AB, integerLDAB,…
NAME dlaneg.f – SYNOPSIS Functions/Subroutines INTEGER function dlaneg (N, D, LLD, SIGMA, PIVMIN, R) DLANEG computes the Sturm count. Function/Subroutine Documentation INTEGER function dlaneg (integerN, double precision, dimension( * )D, double precision, dimension( * )LLD, double precisionSIGMA, double precisionPIVMIN, integerR) DLANEG computes the Sturm count. Purpose: DLANEG computes the Sturm count, the number of negative…
NAME dlamrg.f – SYNOPSIS Functions/Subroutines subroutine dlamrg (N1, N2, A, DTRD1, DTRD2, INDEX) DLAMRG creates a permutation list to merge the entries of two independently sorted sets into a single set sorted in ascending order. Function/Subroutine Documentation subroutine dlamrg (integerN1, integerN2, double precision, dimension( * )A, integerDTRD1, integerDTRD2, integer, dimension( * )INDEX) DLAMRG creates a…
NAME dlamch.f – SYNOPSIS Functions/Subroutines DOUBLE PRECISION function dlamch (CMACH) DLAMCH DOUBLE PRECISION function dlamc3 (A, B) DLAMC3 Function/Subroutine Documentation DOUBLE PRECISION function dlamc3 (double precisionA, double precisionB) DLAMC3 Purpose: DLAMC3 is intended to force A and B to be stored prior to doing the addition of A and B , for use in situations…
NAME dlamchf77.f – SYNOPSIS Functions/Subroutines DOUBLE PRECISION function dlamch (CMACH) DLAMCHF77 deprecated subroutine dlamc1 (BETA, T, RND, IEEE1) DLAMC1 subroutine dlamc2 (BETA, T, RND, EPS, EMIN, RMIN, EMAX, RMAX) DLAMC2 DOUBLE PRECISION function dlamc3 (A, B) DLAMC3 subroutine dlamc4 (EMIN, START, BASE) DLAMC4 subroutine dlamc5 (BETA, P, EMIN, IEEE, EMAX, RMAX) DLAMC5 Function/Subroutine Documentation subroutine…
NAME dlamchf77.f – SYNOPSIS Functions/Subroutines DOUBLE PRECISION function dlamch (CMACH) DLAMCHF77 deprecated subroutine dlamc1 (BETA, T, RND, IEEE1) DLAMC1 subroutine dlamc2 (BETA, T, RND, EPS, EMIN, RMIN, EMAX, RMAX) DLAMC2 DOUBLE PRECISION function dlamc3 (A, B) DLAMC3 subroutine dlamc4 (EMIN, START, BASE) DLAMC4 subroutine dlamc5 (BETA, P, EMIN, IEEE, EMAX, RMAX) DLAMC5 Function/Subroutine Documentation subroutine…