Bug#902760: [Bug #902760] Testsuite fails with ARPACK 3.6 (#1107)
Hi Sylvestre, On Sun, Aug 12, 2018 at 10:31:54AM +0200, Sylvestre Ledru wrote: > Looks like https://github.com/opencollab/arpack-ng/issues/142 ? do you intend to include the patch which closes that upstream issue into an arpack Debian package release in the near future? Kind regards Andreas. -- http://fam-tille.de
Bug#902760: [Bug #902760] Testsuite fails with ARPACK 3.6 (#1107)
Looks like https://github.com/opencollab/arpack-ng/issues/142 ? S On 27/07/2018 01:34, Andreas Tille wrote: > Hi, > > just forwarding the suspicion of igraph upstream that the problem is > caused by arpack. I'm tempted to reassign bug #902760 but I'd like > to hear your opinion first. > > Kind regards > > Andreas. > > - Forwarded message from Tamás Nepusz - > > Date: Thu, 26 Jul 2018 11:19:03 -0700 > From: Tamás Nepusz > To: igraph/igraph > Cc: Andreas Tille , Author > Subject: Re: [igraph/igraph] Testsuite fails with ARPACK 3.6 (#1107) > > Okay, I am pretty certain that this is an inherent issue with ARPACK 3.6; the > same problem can also be triggered in GNU Octave (4.4.0) when linked with > ARPACK 3.6 (I tried it on a Mac with Homebrew). The code below produces the > PageRank matrix of the graph from the igraph test case: > > ``` > octave:1> m = ones(11, 11) * 0.15 / 11; > octave:2> m(1, 2:11) += 0.85; > octave:3> m(2:11, 1) = (1 - m(1, 1)) / 10; > ``` > > and it blows up exactly the same way: > > ``` > octave:4> [v, lambda] = eigs(m, 1) > error: __eigs__: eigs: error - in dnaupd > error: called from > eigs at line 285 column 18 > ``` > > I'll file a bug report to `arpack-ng`. >
Bug#902760: [Bug #902760] Testsuite fails with ARPACK 3.6 (#1107)
Hi, just forwarding the suspicion of igraph upstream that the problem is caused by arpack. I'm tempted to reassign bug #902760 but I'd like to hear your opinion first. Kind regards Andreas. - Forwarded message from Tamás Nepusz - Date: Thu, 26 Jul 2018 11:19:03 -0700 From: Tamás Nepusz To: igraph/igraph Cc: Andreas Tille , Author Subject: Re: [igraph/igraph] Testsuite fails with ARPACK 3.6 (#1107) Okay, I am pretty certain that this is an inherent issue with ARPACK 3.6; the same problem can also be triggered in GNU Octave (4.4.0) when linked with ARPACK 3.6 (I tried it on a Mac with Homebrew). The code below produces the PageRank matrix of the graph from the igraph test case: ``` octave:1> m = ones(11, 11) * 0.15 / 11; octave:2> m(1, 2:11) += 0.85; octave:3> m(2:11, 1) = (1 - m(1, 1)) / 10; ``` and it blows up exactly the same way: ``` octave:4> [v, lambda] = eigs(m, 1) error: __eigs__: eigs: error - in dnaupd error: called from eigs at line 285 column 18 ``` I'll file a bug report to `arpack-ng`. -- You are receiving this because you authored the thread. Reply to this email directly or view it on GitHub: https://github.com/igraph/igraph/issues/1107#issuecomment-408188667 - End forwarded message - -- http://fam-tille.de
