matlab中计算特征向量及特征值

A=[ 7 3 5 3 4 6 2 1 3 ] A=[7 3 5;3 4 6;2 1 3]; [x,y]=eig(A) x =

-0.7772 + 0.0000i -0.2952 - 0.0390i -0.2952 + 0.0390i -0.5692 + 0.0000i 0.9253 + 0.0000i 0.9253 + 0.0000i -0.2681 + 0.0000i -0.2319 + 0.0362i -0.2319 - 0.0362i y =

10.9218 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 1.5391 + 0.1083i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 1.5391 - 0.1083i 下面是帮助文件里面的eig的用法 >> B = [ 3 -2 -.9 2*eps -2 4 1 -eps -eps/4 eps/2 -1 0 -.5 -.5 .1 1 ]; B = [ 3 -2 -.9 2*eps -2 4 1 -eps

-eps/4 eps/2 -1 0 -.5 -.5 .1 1 ]; [VB,DB] = eig(B) B*VB - VB*DB

[VN,DN] = eig(B,'nobalance') B*VN - VN*DN VB =

0.6153 -0.4176 -0.0000 -0.1437 -0.7881 -0.3261 -0.0000 0.1264 -0.0000 -0.0000 -0.0000 -0.9196 0.0189 0.8481 1.0000 0.3432 DB =

5.5616 0 0 0 0 1.4384 0 0 0 0 1.0000 0 0 0 0 -1.0000 ans =

0.0000 0 -0.0000 0.0000 0 -0.0000 0.0000 -0.0000 0.0000 -0.0000 0.0000 0.0000 0 0.0000 0.0000 0.6031

VN =

0.7808 -0.4924 -0.0000 -0.1563 -1.0000 -0.3845 0 0.1375 -0.0000 -0.0000 -0.0000 -1.0000 0.0240 1.0000 -1.0000 0.0453 DN =

5.5616 0 0 0 0 1.4384 0 0 0 0 1.0000 0 0 0 0 -1.0000 ans =

1.0e-14 *

-0.2665 0.0111 -0.0559 -0.0167 0.4441 0.1221 0.0336 -0.0250 0.0022 0.0002 0.0007 0 0.0333 -0.0222 0.0222 0.0111