home bbs files messages ]

Forums before death by AOL, social media and spammers... "We can't have nice things"

   comp.lang.fortran      Putting John Backus on a giant pedestal      5,127 messages   

[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]

   Message 4,538 of 5,127   
   pehache to All   
   Re: Eigen stuff   
   18 Nov 23 23:25:20   
   
   From: pehache.7@gmail.com   
      
   Le 18/11/2023 à 16:29, db a écrit :   
   > I don't find an ng on numerical computation, and I use   
   > Fortran, so I ask here: what is a good routine for   
   > computing eigenvalues and -vectors? I have an old   
   > version of RGG but am not happy with it. Is there   
   > something better?   
   >   
   > I anticipate the question, why am I unhappy with RGG?   
   > Among other things, it's an old f77 routine.   
      
   What's the problem with an "old f77 routine"? Does it give you   
   unsatisfactory/wrong results? Do you need to modify it and are you stuck   
   with some spaghetti code? Other...?   
      
   LAPACK has also several routines for that task, but it's also "old f77   
   code". But assuming you are using an optimized version of BLAS/LAPACK   
   it's fast nonetheless.   
      
   --   
   "...sois ouvert aux idées des autres pour peu qu'elles aillent dans le   
   même sens que les tiennes.", ST sur fr.bio.medecine   
   ST passe le mur du çon :    
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]


(c) 1994,  bbs@darkrealms.ca