Is it possible to get the eigen values in decreasing order (and the corresponding eigen vector as well) instead of increasing order while using the function eig(X) ?

Is it possible to get the eigen values in decreasing order (and the corresponding eigen vector as well) instead of increasing order while using the function eig(X) ? I need it to apply KLT on an image.

Answer 1

[Walter Roberson]

The order of eigenvalues is not specified and in general will not be sorted (because in general they may be complex)

If you want a particular order you can place them in order afterwards. For example read the full documentation for sort