[Octave-bug-tracker] [bug #54342] rand() produces different results on octave 4.4.0 compared to earlier versions

[Rik]

Update of bug #54342 (project octave):

                Severity:              3 - Normal => 2 - Minor              
                Priority:              5 - Normal => 3 - Low                
              Item Group:        Incorrect Result => Regression             
                  Status:                    None => Confirmed              
        Operating System:       Microsoft Windows => Any                    

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Follow-up Comment #1:

Confirmed, that there is a difference when using 'Inf' as a seed.  On the
other hand, 'Inf' is not generally a seed value I would choose.  For finite
state values like 1, -5, pi, the random number generator produces equivalent
results.  I am marking the bug as a regression, but lowering the priority
since there is the very easy workaround of not using Inf as a seed state. 

For reference with respect to other non-finite values:

Octave 4.2.2


octave:2> format long
octave:3> rand ("state", -Inf)
octave:4> rand
ans =  0.844421851525048
octave:5> rand ("state", NaN)
octave:6> rand
ans =  0.844421851525048
octave:7> rand ("state", Inf)
octave:8> rand
ans =  0.844421851525048


Octave 4.4.0


octave:2> format long
octave:3> rand ("state", -Inf)
octave:4> rand
ans =    8.444218515250481e-01
octave:5> rand ("state", NaN)
octave:6> rand
ans =    8.444218515250481e-01
octave:7> rand ("state", Inf)
octave:8> rand
ans =    6.353574441341173e-01




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