Re: svds test failures

[Marco atzeri]

On 8/7/2011 4:28 PM, Rik wrote:

> > Is it possible that rand/randn are not producing the same value
> > on all the system, eventually due to different rounding ?
> I suppose it is possible.  Ben Abbott and I were trying to debug svds
> failures on Mac OS systems and we compared Linux to Mac OS rand number
> generation and we got the same values.  But, no comparisons with other OS
> were ever made.  Perhaps someone else has done that experiment on the
> mailing list and can speak up.
>
> I'm not opposed to changing the initialization seed and this is probably
> the fastest way to get these tests working.  I tried moving to 43 and it
> works on a Linux system.  In order to be certain you need to run the svds
> code repeatedly.  Here is what I ran
>
>   for i = 1:1000
>     bm(i) = test ("svds");
>   endfor
>   sum(bm)
>
> ans = 1000
>
> If you can repeat this test on your machine then I will just change the
> initialization point.
>
> Regards,
> Rik

on cygwin with 43

octave:1> for i = 1:1000
>    bm(i) = test ("svds");
>  endfor
octave:2> sum(bm)
ans =  1000

eventually we should ask a check also for mingw version.
Just to be sure

Regards
Marco