Re: goals for 3.1

[Rolf Fabian]

John W. Eaton wrote:
> 
>   * fsolve compatibility
>       -- input/output args should be compatible
> 

What do you mean by 'compatible' ?


John W. Eaton wrote:
> 
> Comments or suggestions?
> 

  * linear algebra
     noninteger matrix powers fail for
     defective square matrix input
     without any warning.

     This wasn't changed since I came 
     across Octave ( around  V2.0.x ).

     Now for Version 3.x at least a warning
     should be displayed.

     In case you don't remember what I mean,
     try e.g.

:4> x=triu(ones(2))
x =
   1   1
   0   1

:5> x^2       # OK because of integer exponent
ans =
   1   2
   0   1

:6> x^2.5     # INCORRECT
ans =
   1   0
   0   1

:7>x^3         # OK because of integer exponent
ans =
   1   3
   0   1

:8>ans^(1/3)   # INCORRECT
ans =
   1   0
   0   1

Rolf Fabian
<r dot fabian at Jacobs-University dot de>
     
     

-----
Rolf Fabian
<r dot fabian at jacobs-university dot de>

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