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Instructions for the Installation and Use of EISPACK

This  note is  intended  to help a  person install  and test
EISPACK.  The  instructions  are designed for a person whose
responsibility is the maintenance of a mathematical software
library. We  assume the reader  has  a  working knowledge of
the computer system and some experience with  numerical cal-
culations.  The  installation procedure  involves  reading a
magnetic tape, creating a  library from the Fortran  source,
then running and examining the output of the test programs.

Tape Format

     EISPACK is distributed in the form of a  magnetic  tape
which  contains  the Fortran source for EISPACK, the testing
aids and the initial program comments.

     The tape contains 55 files. The usual format is 9 track
EBCDIC  or  ASCII,  unlabeled,  80  characters  per  logical
record, 40 logical records per block, 1600 bpi.

Tape Content

     There are two versions of each routine in EISPACK: real
(single) and double precision. These versions are written in
standard ANSI  1966  Fortran  IV  and  are  totally  machine
independent.  The installer should not have to change any of
the EISPACK programs.  If a change is necessary  please  let
us know what was changed.

File 1   The information presented here on installing EISPACK
File 2   Single Precision EISPACK            75 Subroutines
File 3   Double Precision EISPACK            75 Subroutines
File 4   A program to extract subroutines
         from a sequential file

     There is a collection of testing aids which should help
in checking out EISPACK after it has been installed.

Test Aids

     Files 5-18    Single precision testing routines
     Files 19-32   Double precision testing routines
     Files 33-52   Input data for the test aids

     In order to give the user some form of online  documen-
tation  for  EISPACK, we have prepared a file which contains
initial program comments. These comments describe,  in  gen-
eral terms, what the routines do and the meaning of the cal-
ling sequence parameters. This is not intended to be a  com-
plete  discussion  of what the routines can do or how to use
every facet of them.  For this information see [1,2].

File 53   Initial Program Comments for the Single Precision Version
File 54   Initial Program Comments for the Double Precision Version

The last file on the tape, file 55, contains a  Unix  script
for carrying out the testing on a Unix machine.

Creating a Library

     For the creation of the library, first you must  decide
which precision version of the package you intend to install
at your site.

To install the single precision version you will  need  file

To install the double precision version you will  need  file

We suggest you compile and create a load module library from
the appropriate file.

     To help in extracting individual EISPACK routines  from
the  sequential file on the tape we have provided a program.
This program, given a file containing many subroutines  will
produce  many  files  each containing a single subroutine or
function. The file name will be the same as  the  subprogram
followed  by ".f".  This program that does this can be found
in file 4.


     After the library is created, the testing  aids  should
be  run.  The testing aids are in files 5-32 on the tape and
are organized as follows:

   File          Name          File          Name
          (single precision)          (double precision)
    5            RG             19           RG
    6            RS             20           RS
    7            RSB            21           RSB
    8            RSP            22           RSP
    9            RST            23           RST
    10           RT             24           RT
    11           CG             25           CG
    12           CH             26           CH
    13           RGG            27           RGG
    14           RSG            28           RSG
    15           RSGAB          29           RSGAB
    16           RSGBA          30           RSGBA
    17           RL             31           RL
    18           RBL            32           RBL

     Each test file contains a main program and several sub-
routines which read in test matrices or compute a residual.

     The test programs require some input data to  run.  The
input data can be found in files 33-52.

  File     Name       File for         File for         File for
                   Input Data on    Input Data on    Input Data on
                   Logical Unit 1   Logical Unit 2   Logical Unit 5

5 or 19     RG           33              none              34
6 or 20     RS           35              none              36
7 or 21     RSB          37              none              38
8 or 22     RSP          35              none              36
9 or 23     RST          51              none              52
10 or 24    RT           39              none              40
11 or 25    CG           41              none              42
12 or 26    CH           43              none              44
13 or 27    RGG          45               46              none
14 or 28    RSG          35               47               36
15 or 29    RSGAB        35               47               36
16 or 30    RSGBA        35               47               36
17 or 31    RL           48              none             none
18 or 32    RBL          49              none              50

     Small changes may be required in the test drivers,  for
example to change the the logical unit input or output or to
include a program card.  The test drivers require input data
to be read.  This test data is contained in files 33-52, and
is described in more detail later. We  have  used  the  OPEN
statement  in Fortran 77 to associate the data file with the
appropriate logical unit number.  If you do not have a  com-
piler  that  supports  Fortran  77, you must remove the OPEN
statement and  associate  the  input  data  files  with  the
appropriate logical unit.

     The amount of time required to complete the  test  runs
is small.

Comments and Questions

     We hope that  no  difficulty  will  be  encountered  in
installing  EISPACK,  but if a problem occurs we will try to
help. We are especially interested  in  comments  about  the
performance  of the codes.  These comments and questions can
be directed to:

  Jack Dongarra
  Mathematics and Computer Science Division
  Argonne National Laboratory
  Argonne, Illinois 60439

  Phone: (312) 972-7246



  [1]  B.T. Smith, J.M. Boyle, J.J. Dongarra,  B.S.  Garbow,
       Y. Ikebe, V.C. Klema and C.B. Moler, Matrix Eigensys-
       tem Routines - EISPACK Guide, Lecture Notes  in  Com-
       puter Science, Vol. 6, 2-nd Edition, Springer-Verlag,
       Berlin, 1976.

  [2]  B.S. Garbow,  J.M.  Boyle,  J.J.  Dongarra  and  C.B.
       Moler,  Matrix  Eigensystem  Routines - EISPACK Guide
       Extension, Lecture Notes in  Computer  Science,  Vol.
       51, Springer-Verlag, Berlin, 1977.

                    EISPACK subroutines
Subroutine   Matrix form                  Capability
BAKVEC       sign-symmetric               back transformation
BALANC       general                      scaling
BALBAK       general                      back scaling
BANDR        symmetric band               reduction
BANDV        symmetric band               some eigenvectors
BISECT       symmetric tridiagonal        some eigenvalues
BQR          symmetric band               some eigenvalues
CBABK2       complex                      back scaling
CBAL         complex                      scaling
CG           complex general              find eigenvalues/eigenvectors
CH           complex Hermitian            find eigenvalues/eigenvectors
CINVIT       complex Hessenberg           some eigenvectors
COMBAK       complex                      back transformation
COMHES       complex                      reduction
COMLR        complex Hessenberg           all eigenvalues
COMLR2       complex Hessenberg           all eigenvalues and vectors
COMQR        complex Hessenberg           all eigenvalues
COMQR2       complex Hessenberg           all eigenvalues and vectors
CORTB        complex                      back transformation
CORTH        complex                      reduction
ELMBAK       real                         back transformation
ELMHES       real                         reduction
ELTRAN       real                         reduction
FIGI         sign-symmetric               reduction
FIGI2        sign-symmetric               reduction
HQR          real Hessenberg              all eigenvalues
HQR2         real Hessenberg              all eigenvalues and vectors
HTRIB3       Hermitian packed             back transformation
HTRIBK       Hermitian                    back transformation
HTRID3       Hermitian packed             reduction
HTRIDI       Hermitian                    reduction
IMTQL1       symmetric tridiagonal        all eigenvalues
IMTQL2       symmetric tridiagonal        all eigenvalues and vectors
IMTQLV       symmetric tridiagonal        all eigenvalues
INVIT        real Hessenberg              some eigenvectors
MINFIT       real                         least squares
ORTBAK       real                         back transformation
ORTHES       real                         reduction
ORTRAN       real                         reduction
QZHES        generalized                  reduction
QZIT         generalized Hessenberg       further reduction
QZVAL        generalized Hessenberg       all eigenvalues
QZVEC        generalized Hessenberg       all eigenvectors
RATQR        symmetric tridiagonal        some eigenvalues
REBAK        symmetric generalized        back transformation
REBAKB       symmetric generalized        back transformation
REDUC        symmetric generalized        reduction
REDUC2       symmetric generalized        reduction
RG           general                      find eigenvalues/eigenvectors
RGG          generalized                  find eigenvalues/eigenvectors
RS           symmetric                    find eigenvalues/eigenvectors
RSB          band symmetric               find eigenvalues/eigenvectors
RSG          generalized symmetric        find eigenvalues/eigenvectors
RSGAB        generalized symmetric        find eigenvalues/eigenvectors
RSGBA        generalized symmetric        find eigenvalues/eigenvectors
RSM          symmetric                    find eigenvalues/eigenvectors
RSP          packed symmetric             find eigenvalues/eigenvectors
RST          tridiagonal symmetric        find eigenvalues/eigenvectors
RT           sign-symmetric tridiagonal   find eigenvalues/eigenvectors
SVD          real                         singular value decomposition
TINVIT       symmetric tridiagonal        some eigenvectors
TQL1         symmetric tridiagonal        all eigenvalues
TQL2         symmetric tridiagonal        all eigenvalues and vectors
TQLRAT       symmetric tridiagonal        all eigenvalues
TRBAK1       symmetric                    back transformation
TRBAK3       packed symmetric             back transformation
TRED1        symmetric                    reduction
TRED2        symmetric                    reduction
TRED3        packed symmetric             reduction
TRIDIB       symmetric tridiagonal        some eigenvalues
TSTURM       symmetric tridiagonal        some eigenvalues and vectors