[Tutor] Help- Regarding python

[eryksun]

On Mon, Feb 4, 2013 at 7:21 PM, Oscar Benjamin
<oscar.j.benjamin at gmail.com> wrote:
> eigenvalues, eigenvectors = np.linalg.eig(C)

First sort by eigenvalue magnitude:

    >>> idx = np.argsort(eigenvalues)[::-1]
    >>> print idx
    [ 0  1  2  3  8 10 11 12 14 22 20 21 18 19 23 24 17 16 15 13  9  7  5  6  4]

    >>> eigenvalues = eigenvalues[idx]
    >>> eigenvectors = eigenvectors[:, idx]

> # 2D PCA - get the two eigenvectors with the largest eigenvalues
> v1, v2 = eigenvectors[:,:2].T