hi
So the point of question is this: the
results that i get have the right values but the signs wrong.
let A be a square matrix. then a eigenvector v to the eigenvalue a is
defined to have the property:
A*v=a*v.
therefor for any real number x (nonzero, zero is never an eigenvector)
x*v is also a eigenvector of A:
A*(x*v)=x*(A*v)=x*(a*v)=a*(x*v)
and since (-1) is a real number, mathematically speaking both results
are correct.
double data[] = { 0.616556, 0.615444,
0.615444, 0.716556};
The right results of eigen value and eigen vector:
eigenvalue= ( 0.04908339 )
( 1.28402771 )
eigenvectors = ( -0.735179 -0.677873 )
( 0.677873 -0.735179 )
The value which i took with the sample code instead are this:
eigenvalue = 0.0490843
eigenvector =
0.735179
-0.677873
eigenvalue = 1.28403
eigenvector =
0.677873
0.735179
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