On 03.09.2012, at 12:29, Philip Nienhuis <pr.nienh...@hccnet.nl> wrote:
> PMFJI > > but, uhm.... > > Lukas Reichlin wrote: >> On 03.09.2012, at 10:39, Rafael Laboissiere<raf...@laboissiere.net> wrote: >> >>> * Rafael Laboissiere<raf...@laboissiere.net> [2012-08-30 23:47]: >>> >>>> * Carnë Draug<carandraug+...@gmail.com> [2012-08-27 16:43]: >>>> >>>>> a new release of control package is out, version 2.3.53, by Lukas >>>>> Reichlin. >>>> >>>> In exercising the tests in inst/@lti/minreal.m, I got the error below. >>>> Is it normal? >> Hi Rafael, >> >> You can check whether the observed and expected results are equivalent >> state-space models (i.e. state-transformation, see command prescale for >> formulae). This can be done, e.g., by inspection of the Hankel singular >> values (command hsvd), time response (step, impulse) or frequency response >> (sigma). >> If they are the same, there should be nothing to worry about. If you want >> the same results, use Reference BLAS (and LAPACK) from www.netlib.org >> instead of ATLAS which you are probably using. The SLICOT authors recommend >> the use of the reference implementations. Correct results are more important >> than minor speed advantages of automatically tuned linear algebra software, >> aren't they? :-) > > ... shouldn't such an interpretation be reflected in the tests then, rather > than a plain "assert" comparison that depends on what (allowed!) dependencies > happen to be in place. > Currently the test just seems to yield confusion. > > Philip Hi Philip I see your point, but currently, the tests are such that if they pass, one can trust the results. If they fail, it is up to the user to check whether the results in this special case are correct and if he has confidence in his SLICOT dependencies (e.g. ATLAS) in general. I don't know how to do this automatically and how to avoid false positive tests (which would be a very bad thing). Do you have any ideas how to check the results of the failing tests? Lukas ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Octave-dev mailing list Octave-dev@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/octave-dev
