diary on
A=gallery(3)

A =

  -149   -50  -154
   537   180   546
   -27    -9   -25

[V,D]=eig(A)

V =

    0.3162   -0.4041   -0.1391
   -0.9487    0.9091    0.9740
   -0.0000    0.1010   -0.1789


D =

    1.0000         0         0
         0    2.0000         0
         0         0    3.0000

V*D*inv(V)

ans =

 -149.0000  -50.0000 -154.0000
  537.0000  180.0000  546.0000
  -27.0000   -9.0000  -25.0000

[U,S,V] = svd(A)

U =

   -0.2691   -0.6798    0.6822
    0.9620   -0.1557    0.2243
   -0.0463    0.7167    0.6959


S =

  817.7597         0         0
         0    2.4750         0
         0         0    0.0030


V =

    0.6823   -0.6671    0.2990
    0.2287   -0.1937   -0.9540
    0.6944    0.7193    0.0204

diary off