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Conference rusure::math

Title:Mathematics at DEC
Moderator:RUSURE::EDP
Created:Mon Feb 03 1986
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:2083
Total number of notes:14613

759.0. "Matrix Inversion.. C/Fortran" by VIRGIN::KRAUS (Buying Land in Costa-Rica ? ) Fri Sep 11 1987 13:09

Hallo ^* !
I am looking for matrix routines written in C or Fortran or Basic. For 
example matrix inversion routine(Gauss,Jacobi,..)
Jan
T.RTitleUserPersonal
Name
DateLines
759.1ask for itPLDVAX::JANZENTom LMO2/O23 2965421Fri Sep 11 1987 14:122
I wrote one in Ada for 3*3.
Tom
759.2ENGINE::ROTHFri Sep 11 1987 14:4718
    I have a number of routines for linear equations, including Gaussian
    elimination, singular value decomposition, etc. from a variety of
    sources, in several languages, some in real and complex arithmetic.

    You'd have to get in touch with me for what you want.  I don't have
    a full EISPACK or LINPACK though - just what I've needed at various
    times.

    You can find assorted routines in books like 'Numerical Recepies',
    as well as the ACM algorithms, and most are simple enough to just
    type in a copy if you needed it.  (Except for sparse matrix code, that
    can get hairy.)

    If anyone else has any good quality numerical analysis software online
    (such as some of the things available on USENET) I'd be interested
    in adding some of it to my set of tools too...

    - Jim
759.3What exactly do you need?AKQJ10::YARBROUGHWhy is computing so labor intensive?Fri Sep 11 1987 18:346
I have copies of the SSP library routines (I am converting them to FORTRAN 77
for my own amusement) and the Recipes collection is on-line - ask 
Mike CURIUM::PETERSON for copies and caveats. Ask for what you need
specifically. 

Lynn Yarbrough 
759.4Example in BASIC:CHOVAX::YOUNGBack from the Shadows Again,Sat Sep 12 1987 00:248
    Here's what I use:
    
    
    	Mat  A = Inv ( B )
    
    
    
    --  Barry
759.5Find LINPACKSTAR::CAPPELLOFCarl J. AppellofWed Sep 16 1987 13:143
    I'd recommend LINPACK over SSP.  The developers of LINPACK were
    a lot more cautious about error control than the old SSP routines.
    There should be a copy of this kicking around the company somewhere.
759.6Other sourcesHOUSE::HERGTPaul L. Hergt; MR02-3/B2, 297-7753Wed Sep 16 1987 18:155
    I remember that Gilbert has a good bliss version if that is all you
    want to do.  (See note #126).  I have EISPack and Linpack; you
    might want to try NETLIB also.
    
    Good luck.