[Octave-bug-tracker] [bug #55264] mean([]) throws division-by-zero warning

[Rik]

Update of bug #55264 (project octave):

                  Status:                    None => Confirmed              
                 Summary: mean([]) throws incompatible warning => mean([])
throws division-by-zero warning

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Follow-up Comment #3:

The decision has already been made to remove the division-by-zero warning, so
there is no controversy.  However, it's certainly not going to be a part of
version 5.0.  

I think it would be okay to add a special case, temporarily.  Make sure it is
well marked with a FIXME note to remove it as soon as bug #46650 is cleared.

Also, take care to preserve both the class and size of the input in the
eventual output NaN.  As it exists today, for example.


octave:3> mean (single ([]))
warning: division by zero                                                     
                       
warning: called from                                                          
                       
    mean at line 149 column 9                                                 
                       
ans =  NaN                                                                    
                       
octave:4> class (ans)
ans = single                                                                  
                       
octave:5> mean (zeros (1,3,0,5))
ans = [](1x1x0x5)

octave:6> mean (zeros (1,0,2), 2)
warning: division by zero
warning: called from
    mean at line 149 column 9
ans =

ans(:,:,1) =  NaN
ans(:,:,2) =  NaN




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