Re: Problem with eig in Octave 3.2.4

[David Bateman]

vliviu wrote:
> 
> I have installed Octave 3.2.4 and fails some tests at make check.
> Some are at eig decomposition, some at imscale etc.
> For instance, trying
> eig(A) for A=[1 3 -2; 3 5 1; -2 1 4]
> gives aberrant results.
> 
> Any workaround? Thanks in advance.
> 
> 

It works for me (3.2.4 MingW version from OctaveForge)

octave:1> [v,l] = eig(A);
V =

 -0.818394  -0.315302  -0.480434
  0.434733   0.207055  -0.876433
 -0.375818   0.926128  0.032380

l = 

Diagonal Matrix

 -1.5120        0          0
       0   4.9045           0
       0           0   6.6076

octave:2> norm(A*v(:,1) - l(1,1)*v(:,1))
ans = 6.2804e-016
octqve:3> norm(A*v(:,2) - l(2,2)*v(:,2))
ans = 6.2804e-016
octqve:4> norm(A*v(:,3) - l(3,3)*v(:,3))
ans = 2.0351e-015

Please be more specific in what you find "aberrant"

D.

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