matrix package with Ada
in [ADA]
|
From: Ada novice on 13 Jul 2010 14:24 I've tried earlier to delete the irrelevant parts but it seems I can't do this once the message is posted. Anyhow, I've used gnatchop [-r] -w *.ada and I got like 19 warnings in the Ad 83 matrix package. And the file test_generic_complex_eigenvalues.ada compiles with lots of errors. So I've abandoned playing with it. Thanks YC
From: Ada novice on 13 Jul 2010 14:26 I've tried earlier to delete the irrelevant parts but it seems I can't do this once the message is posted. Anyhow, I've used gnatchop [-r] -w *.ada and I got like 19 warnings in the Ada 83 matrix package. And the file test_generic_complex_eigenvalues.ada compiles with lots of errors. So I've abandoned playing with it. Thanks YC
From: Simon Wright on 13 Jul 2010 15:11 jonathan <johnscpg(a)googlemail.com> writes: > On Jul 12, 9:13 pm, Simon Wright <si...(a)pushface.org> wrote: >> jonathan <johns...(a)googlemail.com> writes: >> > Finally! The test routine is user unfriendly. (I hope you fix it up >> > for the rest of us.) You have to enter numbers. >> >> Actually, there's a file test_generic_complex_eigenvalues.dat ... > > ... and you have to enter these somehow, without prompt or > instruction. To a Unix fanboi, this seems obvious :-) > In my Linux BASH shell it seems to be straightforward: > > ./test_generic_complex_eigenvalues < > test_generic_complex_eigenvalues.dat > output.txt > > I hope that's right. Now if I compare with the expected output, > > diff output.txt test_generic_complex_eigenvalues.out > > I find that all of the numbers in the 2 files are different. Anything > to worry about? (I say no;-) I found that not all of the numbers were different. Some of the differences were very small. Sometimes vectors were given in the opposite order (there's a note in the AI about that not being a problem). The internal checks did all pass, so presumably the differences are tolerable. But IANAM so I don't know!
From: Ada novice on 13 Jul 2010 16:43 > > I found that not all of the numbers were different. Some of the > differences were very small. Sometimes vectors were given in the > opposite order (there's a note in the AI about that not being a > problem). The eigenvalues are not given in an ascending order. Different software implementations use different ways to present the eigenvalues and eigenvectors (normalizations for the latter). YC
From: robin on 13 Jul 2010 22:02
fitta wrote in message <445503bc-6b5c-4b60-b539-c51dcfa723bd(a)y11g2000yqm.googlegroups.com>... >Thanks a lot. I could unzip it now. I have been using PeaZip to unzip >the package and it wasn't working. I've tried with 7-zip and the >decompression went fine. Thanks for letting me know---I had blind >faith in PeaZip! So I see: >Ada 95 Matrix Math Package >Version 1.01 >First Release, August 1996 >Current Release, September 1996 > >and > >also that a to-do for this package remains: implement eigenvectors/ >eigenvalues, singular value decomposition, and inverses for complex >matrices. > >I haven't try the package yet but I'll hope it'll work for a real non- >symmetric matrix. If it doesn't, you could check out http://members.dodo.com.au/~robin51/numeric.htm which has several eigenvector algorithms in PL/I, including one for general matrixes. |