Eigen and EigenC methods are used to calculate matrix Eigenvalues and Eigenvectors. Their difference is that while Eigen method uses 4 Matrix objects as output parameters, EigenC method uses 2 CMatrix objects.

'Declare a Matrix
Dim A As Matrix
Set A = New Matrix
A.Size 4, 4
A.FillRandom
'Using Eigen method for Eigenvalues Eigenvectors
Dim rVal As Matrix, iVal As Matrix
Dim rVec As Matrix, IVec As Matrix
Set rVal = New Matrix
Set iVal = New Matrix
Set rVec = New Matrix
Set IVec = New Matrix
A.Eigen rVal, iVal, rVec, IVec
'Using EigenC method
Dim Val As CMatrix, Vec As CMatrix
Set Val = New CMatrix
Set Vec = New CMatrix
A.EigenC Val, Vec

With CMatrix objects only EigenC method can be used.

If only Eigenvalues are needed, then matrix parameters used for Eigenvectors can be omitted. In such a case Eigenvectors won't be calculated at all and method execution will be faster.

A.Eigen rVal, iVal

or

A.EigenC Val

See Also:

Referencing ShortName 3.1 | Declaring Matrices | Matrix Properties and Methods | Matrices and Arrays | Basic Matrix Operations | Matrix Decompositions