[Octave-bug-tracker] [bug #49129] Legendre polynomials unnecessarily restricted to [-1, +1]

[Rik]

Update of bug #49129 (project octave):

              Item Group:        Incorrect Result => Feature Request        
                  Status:                    None => Confirmed              

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Follow-up Comment #1:

This is possible, although it would introduce an incompatibility with Matlab
which restricts the range to [-1, +1] (see
http://www.mathworks.com/help/matlab/ref/legendre.html).

There may be ways around the incompatibility.  Octave could issue a warning,
rather than a full error, if x is outside [-1,+1].  Or there could be a
specific warning ID for the legendre function and extended input.  By default,
this warning ID would be configured to produce an error


warning ("error", ID)


But the user could specifically enable an extended input range by using


warning ("on", ID)
OR
warning ("off", ID)


Just some ideas.



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