Module CUNGQR in LAPACK

General Information

Generates all or part of the unitary matrix Q from a QR factorization determined by CGEQRF. (Computational routine.).

Usage

CALL CUNGQR( M, N, K, A, LDA, TAU, WORK, LWORK, INFO )

Classification

D5	QR decomposition, Gram-Schmidt orthogonalization

Type

subroutine in LAPACK package (COMPLEX sublibrary)

Language

Fortran

Availability

Public domain, Portable

Precision

Single Precision

Alternates

ZUNGQR

Double Precision

See also

CGEQRF

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 cungqr

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