Fractional powers of negative numbers giving NaN

[Jaroslav Hajek]

On Wed, Mar 25, 2009 at 2:19 PM, Marco Caliari <marco.caliari at univr.it> wrote:
> Dear all,
>
> I'm writing to this mailing list, although maybe the problem is not
> related to Octave but to libraries/compilers. With Octave 3.0.x, I
> get
>
> octave:1> sqrt(-1)
> ans =  0 + 1i
> octave:2> (-1)^(1/2)
> ans = NaN
> octave:3>
>
> Machine specifications:
>
> AMD Opteron(tm) Processor 248
> gcc (GCC) 3.3.3 (SuSE Linux)
> GNU Fortran (GCC) 3.3.3 (SuSE Linux)
> g++ (GCC) 3.3.3 (SuSE Linux)
>
> ACML 3.6.0 gnu64
>
> Octave was compiled with
>
> CFLAGS='-O3 -m64 -fPIC'
> FFLAGS='-O3 -m64 -fPIC'
> CXXFLAGS='-O3 -m64 -fPIC'
>
> I would appreciate any hint.
>
> Best regards,
>
> Marco
> _______________________________________________
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> Bug-octave at octave.org
> https://www-old.cae.wisc.edu/mailman/listinfo/bug-octave
>

I can't reproduce this neither in development nor 3-0-x branch.

-- 
RNDr. Jaroslav Hajek
computing expert & GNU Octave developer
Aeronautical Research and Test Institute (VZLU)
Prague, Czech Republic
url: www.highegg.matfyz.cz