Plots a ndim gaussian projected onto 2D vecs, where vecs is a matrix whose two columns
    are the subset of some orthonomral basis (e.g. from PCA on samples).

def plot_gaussian_projection(mu, lmbda, vecs, **kwargs):
    '''
    Plots a ndim gaussian projected onto 2D vecs, where vecs is a matrix whose two columns
    are the subset of some orthonomral basis (e.g. from PCA on samples).
    '''
    return plot_gaussian_2D(project_data(mu,vecs),project_ellipsoid(lmbda,vecs),**kwargs)