I use Matrix class in ruby to caculate eigenvalues and eigenvectors. With this code:
m = Matrix[[0.6868,0.6067],[0.6067,0.5978]]
v, d, v_inv = m.eigensystem
the correct result should be:
[ 1.25057433 0.03398123]
[[ 0.73251454 -0.68075138]
[ 0.68075138 0.73251454]]
which I confirmed with numpy using Python.
However, I got the result below:
d=[[0.033970204576497576, 0],
[0, 1.2506297954235022]]
v=[[0.6807528514962294, 0.7325131774785713],
[-0.7325131774785713, 0.6807528514962294]]
Is this a ruby's bug? My ruby's version below:
ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-linux]