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Module DGEQRF in LAPACK

General Information

Computes a QR factorization of a real general rectangular matrix. (Computational routine.).

Usage
CALL DGEQRF( M, N, A, LDA, TAU, WORK, LWORK, INFO )
Classification
D5QR decomposition, Gram-Schmidt orthogonalization
Type
subroutine in LAPACK package (DOUBLE sublibrary)
Language
Fortran
Availability
Public domain, Portable
Precision
Double Precision
Alternates
SGEQRF
Single Precision

Download from NETLIB; Public access repository

Location
The University of Tennessee at Knoxville and Bell Laboratories
Contact
Jack Dongarra, ORNL (dongarra@cs.utk.edu) and Eric Grosse, Bell Labs (ehg@research.att.com)

Installation on ARNO; Silicon Graphics Origin 2000

Location
National Institute of Standards and Technology (NIST), Gaithersburg, MD.
Contact
Gaithersburg Consulting Office: 301-975-2968, consult@nist.gov
Usage
Those logged in to arno.nist.gov or amur.nist.gov may access this module as follows.
Documentation
man dgeqrf
To Link
f90 prog.f -lscs (or -lscs_mp for multiprocessor version)

Installation on ITL; Unix Workstation Network

Location
National Institute of Standards and Technology (NIST), Gaithersburg, MD.
Contact
Gaithersburg Consulting Office: 301-975-2968 (FTS 879-2968)
Usage
Access available only to NIST staff on internal Unix systems. They may access this package provided the /itl tree is cross-mounted.
NeededBLAS
Can be downloaded from netlib
To Link
f77 -o myprog myprog.f -llapack -lblas
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