how to calculate eigen values of a N X N matrix.?

Question

i have 6 X 6 matrixand i have to find the eigen values..does any software do it..is there any addin in excel taht does it..

Answer 1

There are a lot of software libraries that do that:



http://tinyurl.com/k9zah



including some for Excel:



http://tinyurl.com/hrda7

Answer 2

Matlab is probably the best package for this type of numerical calculations, although Mathematica, Maple and MathCad all have excellent eigenvalue routines as well. I'm not a huge Excel user, but I suspect there is an addon for that as well. If you want to write your own code, the Numerical Recipes series of books is a good place to look for a stable algorithm and example code.



Be forewarned that accurately calculating eigenvalues is notoriously difficult, so be sure to extract the eigenvectors and carefully check any answer you get.

Answer 3

If you have a matrix A of dimension N X N, then all you have to do is solve this equation " det(A-mI)=0 " for m. m obtained is the eigen value. I is the identity matrix. det denotes, determinant value of matrix A-mI

Answer 4

maple 9.5!u can get even lower one!at least 6.5!